WftCftL-i^'^^'' . / NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS WARTIME REPORT ORIGINALLY ISSUED Fetrtiary 19^14- as Advance Restricted Report 4B21| EXTENDED TABLES OF STUFTIESS AND CARRY-OVER FACTOR FOR STRUCTURAL MEMBERS UNDER AXIAL LOAD By Eugene E. Lxmdqulst and W. D. Kroll Langley Memorial Aeronautical Laboratory Langley Field, Va. ^ UNIVERSITY OF FLORIDA DOCUMENTS DEPARTMENT 120 MARSTON SCIENCE LIBRARY P.O. BOX 117011 GAINESVILLE, FL 32611-7011 USA KACA ' WASHINGTON NACA WARTIME REPORTS are reprints of papers originally issued to provide rapid distribution of advance research results to an authorized group requiring them for the war effort. They were pre- viously held under a security status but are now unclassified. Some of these reports were not tech- nically edited. All have been reproduced without change in order to expedite general distribution. L - 255 ' i'^HO^Xi.i^ 3^c;<.i-t7 NATIONAL ADVISORY COWIITTSE FOR AERONAUTICS ADVANCE R23TRICTI::D REPORT EXTENDED TABLr":8 OF STIPFNI^SS AND CARRY-OVER FACTOR FOR STRUCTURAL ItEMBERS UNDER AXIAL LOAD B7/ Eugene E. Liind.q\;ist and 7/. D. Kroll SUMMARY The tables of stiffness and carrT-over factor that vv-ere presented, in NACA Technical I-ote No. 652 have been extended to Include the stiffness of a nienber with the far end subjected to a noment equal and opnosite to the noment applied at the near end. These tables are of use in solving proolers in the stabllit;/ of structural members under axial load as well as in the usual applications of the Cross method of moment distribution when the effects of a::ial load in the mer.bers are considered. The values presented are for structural members in v/hich the cross section and the axial load do not vary along the length of the member. The interval between successive values of the argument is small enough to make interpolation unnecessary in engineering calculations. INTRODUCTION The tables of stiffness and carry-over factor given in reference 1 have been found useful in the applications of mom.ent-distribution metliods to a number of structural problems. Recent studies have shown the desirability of including in these tables an additional stiffness that was not formerly presented. The present paper has therefore been written to include in the tables values for this additional stiffness as well as the material of reference 1 and consequently supersedes reference 1. The method of m.om.ent distribution developed by Nardy Cross (reference 2) can frequently be used to advantage In the stress analysis of continuous beams, continuous frames, and rigid joint trusses, some of "/hich occur in aeronautical structures. In reference 5, James summ.arized the principles of the Cross riethod and showed how the effects of axial load in the members m.ay be considered in a moment-distribTition analysis. In reference 4, it was shown how the principles of mom.ent distribution may be used tc solve problenn in the stafcllitj- o± structural ireiTiber? uiider axirl loed. In the stability calculations as veil as in the r.ore usual type of morent-distribution analysis in v/hich the effects of axial load are considered, it is desirable to have tables piving the stiffness and the carry-over factor as a function of the axial load and properties of the member. Such a set of tables was presented in refer- ence 1. Ik the use of the principles of moment distribution as applied to the stability of p-lates (reference 5) the stiffness of a plate vn* th the far edge subjected to a moment equal and opposite to the mojnent applied at the near edge v/as found useful in stability problems in which the assembly of plates was s;>rrun6trical about a plate. Because the equations that must be satisfied for the sta- bility of plates are identical in their general for;"i to those for bars under arial load, a corresponding stiffness for bars is desirable. As is the case for plates, this stiffness is designated 3^^'^, and values are presented herein. The ta'':le3 apply to members for which th.e cross section and axial load do not vary along the length of the member. The interval between successive values of the argument was made rufflciently small that interpola- tion Vvould be urmecerrary f'cr uiost engineering calcula- tions . SYMBOLS E modulus of ela-.ticity E effective modulus oi elasticity for stresses beyond the elastic range I mom.ent of inertia of cross section about centroidal axis perpendicular to plane of bending I. length of member P axial load in m.em.ber (absolute value) ITS cvi I L L -, —CSC — - 1 a = b (. SL [ 1 / v3/ 1 - ^ cot ii 6 = 5 J J J/ 2 -N V f ^ For conpreasion rfiCxiib'jrs a = 6 L , L . — cech — - J. J J P = 5 1 - -. coth ^ J J /- For tension members • _ , ^ -I- -^ - V T j "^'^i .' p 1 / Vtpt Effective values of a and p are obtained byy tut ion of (L/j) „^ for l/ j . exf s ub s 1 1 - k The s^TTibols lAsed to designate the stiffness and c&rry-over factor for the different typee: of restraint at the far una ai-e given in the follo'ving tahle and corresncnd tc there Msed In reference '•'-): j Carry-ovor ( Sbiffness , factor ! C Conditions n t far end Far end fixed agaizist rotation. 3I oil r.-'-- = n Frv end elastically restrained against rotation. No restraint egainet rotation at far end. rv -1 j I'-ar end suojected to a rioment e'lual and opposite to that aioplied at near end I . I nT Q 1 T II The quantities C-^, C^, S-^S and C-^-^ oi' this paper are the quantities S', c', ?', and c", respectively, of rix'erences 1 and 4. DEFINITIO'^S The followinrr def i niti'-^ns of carry-ovei' factor arxd stiffness p.re thf.- sa-ne as those f^;lven in reference I4., Crr r v-over f ac to-p . - I*" a rneiaher :-.s on lUiyielding supports at each end arc a r.icment is applied at the near end, the ratno of the r-.c.-aent developed at the far end to the -nonent applied at the near end is called the carry- over f^-'Ctor, Stif ^ges g .- If a riemb^r is on unyielding supports at each end, the rrc.nent at one end nscessa^^* to produce a rotrtlon of one-fourth radian of that end is called the stiffness. The stiffness of a member cciti'Duted according to this definition is one-fourth that corriputeQ according to the definition used "by Cross (reference 2). In the Gross method, the relative stiffness of the members is of im- portance and not the absolute value. The foregoing definition was selected so that the stiffness of a member of constant cross section with no ajcial load and fixed at the far end would be EI/L instead of J4.EI/L. Sign convent ion.- The sign convention used in this report is the same as that used in references h. and 5* A clockwise moment acting on tlie end of a member is positive. An external moment applied at a joint is considered to act on the joint; a counterclockwis© moment acting on a joint is positive. rpflPT tPQ Tables I and II do not give directly the values of stiffness bub_give. Instead, values of stiffness divided by a factor EI/L. The actual stiffnesses are therefore obtained by multiplying the values in the tables by EI/L, The value of C is read directly from the tables. ;i/l' Form-ulas used in calculation .- The quantities qll c IV ~ ', ~ , and G are tabulated for values of ei/l ei/l (L/j)^P^ in tables I and II for compression and tension, respectively. The stiffness 3-^ and carry-over factor C^ that apply when the far end of the member is elastically restrained are dependent on the restraint at the far end and can be computed by the formulas given in reference I|. or 5 • In the elastic range of the material comnrising the - - / ^ '' I T \ m.embers, E = E and l^] ^^ ' -^ I. Above the elastic X .1 .pf f. \ 1 ■■• range, however, it is necessary to use a reduced modulus which is called the effective modulus. A method for ob- taining the effective modulus from the accepted coliyTin formula for the material is described in I'eference Ij.. The forr'ulas usod In calculatirn; the second, third, fovirth, end sT.venth coli^rirs In tables I rnd II are; -^ (1) All .J. ki/l k{i (2) hi/i. ei/l ii - c^i L-" (3) ^1 et/l 3TI 7"r /t -■^ ci (i;) Equation? fl) and ^2) ,;ere first presented by James in reference ?. Equation (J) fo"^ lov»s rrom equation (1?) of reference li, and equation (h,-) > fnora equation ill;.) of reference 5« The fifth and si-x^-.h coli-iT'ins in tables I and TI were obtained fror.' the preceding colu:nn3, as indicated by their headings. '^hcse colunii? a-^e included as a con- venience because tTiey are of u.?3 in some stability calculations (reference h.) . Ac cur used in fa presented Equations second, th fifth colu The s Ix \.h column and colu2nn v;as columns . fi^;ures an, taken; in order i^^;re where irre ac c- or eg are ac (1), ( ird, sn :'an VvT.s coluir.n mu],ti there All V d the sorr^e c used. £ulcri of tablen.- The tables of reference 6 ii'ere arr tion of tables I and II. All values c'uj^ate to tiie nu:nber of places given. 2), and (5) v/ere u.sed to calculate the i jToui'th coluinns, respectively. The ootamed oy squaring-- "cl e second column. obtained by sqi'saring the fourth v/aj plying bv tbe fifth colurrn. The sixth fore ;:3ade to aepend on ail preceding a lues were tabulated to six significant differences for the last col'^ir;u? wei-e ases differences as hi^h as the fourth The diff'jrencas v/ere studied and, ties occurred, the tables were checked. An independent cVieck -Nat^ also made of a series of values oIV throughout the tables. The ^-^alues for z~r were ei/l computed from equation (1^) and were independently checked. Langley I-'^etnorial Aeronautical Laboratory, National Advisory Committee for Aeronautics, Langley Field, Va. 1. Lundquist, Eu.geKO E., end ICroll, '*"/. D. : Tables of Stiffness and Carry-Over Factor for Structural ^1elnbers under Axial Load. T.N. ilo. 652, NACA, 1938. 2. Cross, Hardy: Analysis of Continuous Frames by Di s tr Ibut ing Fixe d-End Moment s . Trans . A . o . C . E . , Vol. 96, 1952, pp. 1-10. 5. James, Benjamin viylle : Principal iilffects of /i: CO ITNOJCO U~N CO rH_:d-u-svS lrvd-r^a^^^^ •-i r-{ r-i r-t G OOOOO O ^^,-;-^CNcr^ (f-. C • O-^XD ■ O (.OCO-.j ' *--0 t— ^- D- (^ [- - 0-t-— -O •X)--0 0^i3^D LTMf ■ '. rH^^ K^(M_J■ •^DMD c— tr-c— sO "^O ""^ •~0'^ CM ^^J (\| OJ r\j 0\vOvDcO_:t tTNNNrH u lU C7NCM irsC— o C"— ^'1 CO "O (7-. CM OJ CM CM CM iH OJ Lr\rH O [>--0 LTM/MTN ro^JD O^CM LTV ^^a^0"^0 o f\J OJ OJ CM OJ rS Lr^CM CM lT* OCG 0_d-rH i-(_^OGm-H lOlT. jj tr^ O O r-4_:^-^ u . 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CO ir>OJ rH rH O-.ir rH C^KN COCO CO t^r- OOOOO OJ t^KN rH O KNLT'a-Cj-O ONlT rH CO U^ nOnOnO lTNlT^ OOOOO NO CNOrH_zh^ CO lAoj o"^ o S^^^"- o K^co OJ t^ CO -H L/NrH r^ nO _d-rH 0N--0 ^f^^^^N~^oJ oj o o o o o OJ nO rH r^rH u~^K^^^^^^\L^■ _dCM O.X)NJ3 OJ OJ OJ rH rH OOOOO NO t--t\0 0_zj- C^rH ITNrH C^ ^1 K 1 rH O QD f~i r-i 1-^ i~i O OOOOO OnOJnO OnOJ _::l-rnO NOnOnOnONO vOnONONOnO *H OJ KVd""^ I-* r-\ f~^ t~i ,-^ NO NO NO NO nO NO r-oD onO r^ r~i i-i r-H (^i NO nO NO NO NO rH OJ K^_d■u^ OJ OJ OJ OJ OJ no t"-CO (MOJ (M ^ nO nO ~0 ^^ nO no nO no lu < M aON>co_d-irv nooojnond ^'~tt^l3-'-* ononoknon CO OJNO OJ on no lpno r-oN CO NO [^ir\t— COrHCOO t^ roONiTVzf "^ 0>£0 rH 1/NCTn O OGOKNC^ iTCO -_d*^co O ONO t^^ CO O OJ LTNON OJ_:d-LrNNO c^ N~\0 QnCOno -dt^o o •-* COCOnO f-i^ ro,co_d"'-*cO ONO OJ-dLTN irvd-d--dt- co t^-d^ o iTNNO r—co rA nO l/NlTn^O on C^ONrH NNLfN _jj-0 iTNrH to l/NONrH fOMTN LrNoj-d"0 OJ OJ t^rc\r-i O QD O ^^^NO on NO ONi-TxONON O OJ C^O rH OJ oco ONiO rH.^JD ITMJN OJ LTNIO OJnO H rHCO ONNO rr\rH ONrH O r-OJ CNrHNO O LTnOM/nO O O O rH OJ OJKNN^KNrO ^^^N^^^^^^^^r^ rrNf-ONNO rH OJ OJ rH O -O O iTNrHaj o_dt^^ J- nonono r^^- _:J-t^ONLrNOJ ONQDCO 0_d U"^L^_d'^CO CO (mno o_d C"-COCO ONON .jtf^CTNNO LTN O ONOJ O r-i OJ iT^ZO r-* l-*^ J-oj o ONr- 7^ rHrH O O f-ON-drH ro COnOnO r—rH CO CMnO o on u-VdCM rt,::t O O O O ON r^ r-{ f-i <-t f-t r-t t-t t~t r-* f-i rM rA rH r-t r-i rH rH rH t-i O Oco CO C^ fONO c7N^f^^- OJNO rHCO LfN ONfTNCO OJ C^ C— vO_rftOrH ON ON ON C'-^ ON O 00 ONt^fO r-t fOK^OJ ON _:j-rO KVdLTN OJ ^-oj t--oj oco r-irN_d ON3DGOCOCO rH ONOJ t^O roro rH_j-_d CO r-i iTNcrCd C^rOCO ^^^ON OJ rH CTCOnO C-^nO KVd*^ coco tOCM LTN OnlTnoJ OnnO _^ONO rH C^ irvdoj rH ON t-oj ovdt^ CM KNnO tOOJ ^OJ O ONTO KNOni/nOnO cono Ln_r^fM nOnDnOnO nO NOCOOO iTvON CO KMOnO KN -H-dO OnO -d-rH O rH LP rH ONO^rH_d" rHCO ONJ-rH NO OJ o^. C^U^ - • - U-\3'fM rH O O^CO C^U-Xd" fOOj rH O On , -f d -d-d— d toKNfOtofO tOfOfOtocM f\J-dt*-rHNO rH ON ONOJ NO coco ONrH OJ CO [^-•-OnO lP- oj OJ j CM OJ OJ iH C^rH rHCO _d- rHrH CM J- irXO rH_:^T^ O CTnO-CO t^ O ON-dWNCO ON-dfV rH rH 03CQCM'-0 f-^O LTNiA-d rH r~i rH rH^ r-rHCO ONO N^C^rHCO to 0_^ONfOCO ^J-tOfM CM rH lOr-CM O rH _J-.J>0 O^KN tooD ^^^co_d■ rH O O ONON rH r^ rH O C> rHrH rH rH rH rH rH rH rH rH rH rH rH rH rH I I I I I I I I I I I I I I I I I I I I t I I I I rHfMKVd"*^ NO C*-00 OnO -d-_d'^-d--d- -d-d--d-d-'J^ ^^ ITMOLOlOtO LfN lO l/N LPvtO KVd-LO i/nlTnlO • • • • • lOUPiLfMOt/N NO C^-OO OnO I/NLP iOI/nnO NO r-co onO irMOlOU^U^ LOiPlpvLPU^ lOlOlTMOlO lOUNlOU-MO lOlOlOtTMO U^lO U" iP- lO . 14 TABLE II.- TENSION VjJeff c s" EI/L s El/L C^ S2c2 siv El/L (EI/L)2 .1 .2 i .5 0.500000 •499757 .1+99001 .1+97760 .1+96053 .1+93831 0.750000 .750512 .75I996 .751+468 .757? 61+ .762412 1.00000 1.00056 1.00133 1.00500 1.00552 1.00831 0.250000 ■ 21+9757 .21+9002 .2L7765 .2I+60I+9 .2I+3&69 0.250000 .249936 .21+9665 .21,9252 ,2U6675 .21+7937 0.500000 .5OOI122 .501666 ,50371+4 .5O66I+? .510374 .6 ■I .q 1.0 .1+91167 .l+e8os7 . 1+81+ s 19 .1+80575 .1+7621+6 .767818 .771+165 .7611+31 .789595 .798652 I.OII9I+ 1.01623 1.02116 1.02672 1.05291 .2I12I+5 .258200 .251+759 .250955 .226810 .21+701+2 .21+5991+ .21+1+798 .21+5U59 .21+1985 .514911 .520252 .526386 .540988 1.1 1.2 1:1 1.5 .1+71556 .1+66550 .I+6119I+ .j;55575 .i+i+9699 .808515 .819215 .650703 .81+291+9 .855921 1.05971 l.Ot+712 1.05515 1.06372 1.07289 .222565 .217651 .212700 .20751+8 .202229 .21+0376 .2 56 61+6 .256799 .231+845 • 252765 .5491+28 .558608 .568510 .579118 .5901+13 1.6 u 1-9 2.0 .14^5591+ .U37286 .1+50802 .1+21+167 .l+171+oi .869586 .685915 .898873 .911+1+29 .930553 1.08262 1.09290 1.10371 1.11505 1.12689 .196775 .191219 • 185 590 .179918 .174229 .250653 .228396 .226081 •223697 .221251 .602376 .6149^9 .628230 .61+2080 ,656518 2.1 2.2 2.S ,1+1051+8 .1+05610 .396616 .589568 .58251+t .9I+721I+ .961+380 .982021+ 1.00012 1.01865 1.15925 1.15205 1.16554 1.17908 1.19325 .160550 .162901 .157505 .151779 .l465l+0 ,216751 .216205 .213621 .211006 .208566 .671522 .607071 • 703145 • n9723 . 7567^2 2.6 - ^:^ 2.9 5.0 ! 5 681+80 .5611+92 .5,^1+555 .51+7676 1.05751+ 1.05683 I.O76I+6 i.oq61i2 1.11668 1.20765 1.22287 1.25827 I.25I+06 1.27022 .iiaoo2 .155777 .150677 .125708 .120878 .205709 .20501j2 .200^69 • 197697 ,195052 .754395 .772264 .790646 .S09429 .82S594 3.1 5.2 3.5 . 5I+O67I .551+ 1U9 .327520 .520990 .511+566 1.15722 I.I5S05 1.17° 09 1.20057 1.221S8 1.28675 1.^0558 1.52076 1.55826 1,55606 .116195 .111656 .107269 .105054 .0989519 ,102378 .IS97I+O .187122 .161+ 529 .161963 .34s 120 .867991 .868188 .908693 .929491 3.6 1:1 .508255 ..502062 .295990 .29001+2 .281+221 1.21+556 1.2651+7 1.26754 1.50976 1.55211+ 1.57416 1.39255 1.41117 1.1+5007 1.1+4921 .0950211+ .09121+15 .0876098 . 08I+1242 .0607615 .1 79429 .176929 .171)466 .17201+2 .169658 .950564 .971S98 •993477 1.01529 l^0573l .270529 .272967 .267555 .26225!+ .257065 I.35U66 1.37751 1.40009 1.1+2297 1.1+4597 l.i+6659 l,l+d820 1.50602 1,52605 1.51+828 .0775763 .0745108 ! 0667666 .0660815 ,167318 .165022 .162771 .160566 .156409 1^05955 1.08197 1.10457 1.12735 1.15028 l;.9 5.0 .252022 .2II7IIO .21+2521+ .25766k .255128 l.l+6q07 1.1+9225 1.55689 1.5b232 I.56S7O 1.58950 1.61008 ' 1.63101 1.65211 .0635151 .0610651 .0567210 .0561+81+3 .05I+5I+06 .156300 .151+238 .152225 .150260 .i4e3i4 3 1^17535 1.19657 1.21992 l.2k338 1.26696 15 t-H IW O IS\0 LTNO o oj Lr>c^o LTnO LTnO LfN CVJ LTN C~~ O CM rH rH rH r^ O O LT'O LTNO irst~o c\i ws O O O O O Lr^O LTsO LTv OtJD OD UD 00 O LTNO LTNO CNcrNaNONO o o o o o lPsO iTnO U> OJ LP r— o r\j O O O r-t rH ra OJ OJ OJ rH o o o oo o ltno lr^o irst — o po lt-^ rH rH OJ OJ OJ iH iH »H i-H i-t O O O O O LPvO Lr>0 U~N c^o OJ m^- oj ^o^N>,^f^^"\ fH r-4 i-H rH rH ' O O O O O O LTNO LTNO ■ ojojojf\jr\j ojojojojCM ojoj>-vjojoj (Mojryojoj f\)f\jf\jojrc\ N^^^^N^K^K^ NArorr\pr\ro\ K^^f^K^K^^^^ ^O OJ O rH_^ ON cr\ ctn ON ON o o o o o _^^-0 O OJ ONL^^^^\r^ ON O LfNrHa:) LfN O LnrHM3 OJ C— nOnO lTM/N ON O ON ON ON o o o o o LT'^t^r-i OJ l^-LTOJ CTvd- LO ^ O NO OJ On ON ON ON cn o o o o o C~^CTnOnC~-O0 ojNO rH i>-_d- nj CM OJ (-H rH CO rONONO O _3-_zi-0 NN,N^ H ON'TD O-C— OJO) LfNfNJ ON rH O O O CTN CnOnc?nC7VX) o o o o o C^_trH_H-K\ X) O ■O H o r~-aNO K%MD VO K^rHCO LfN (JnonOnCOiT) '-0 CO CO OD CO o o o o o C^OJ ONLfNO _d-_:Jcoco N'\ cr.KNC^rvjco CM O C^LfNCM coco i>-r~-c^ O' J CO CO CO o o o o o rHCO ON^O OJ LTNrrNvD rTA J-O [>-_d-iM Geo ir\tr\r-\ C—-^ vO NO ^ o COiXt'Ororo O O O O O rONAKNrrNNN | CO mrH_itJ- i r<\CO t— ONLfS O O C— £>vD ONNO_;jTM O lTn i/n ir\ ltn i/N ■TD O'O'O-O O O O O O C^^CMnO ro» LfNO l/nonKN COCO CO ONCM _::J-rH O l/Nf-f rH O O O O O O CO O ON_zfC*- NO ifNO OnO c^^o fM_±-o f^-NO^rvj O o o o o o CO O a>co ro rH O pr\0 O -^ <-* 0-j±oj C^^ !<> I>^ rH NO CO C—LTV^tOJ .-O ' O ■ "O CO rO o o o o o o o o o o _^KO rH O N-N O OnC—iH o J-ONOnN^O 7-lvJD CM CT-NO i-t Oni OnO LfN CO ^-^-^-[^- o o o o o o o o o o rOiOco [^-NO WN O '. J NO _d- _^| KN, rH o ON o o o o o o o o o o -d- CT.OJ rH LTN C■f^O^^^^0N OJ CO 'X) CTnKVOnO ON,_ ^O O rH CM rH (H O On nO ^-O sO ^-O LfN O O O O O O O O O O M ONLTNOJ {M_d- nood o ojI3- LfNON_d<0 CM T-i K>nOCO rH r-c~-r^r--co t>-f\J ONCO ON NO ONrH^C-- nO O LTvONtOv KNNO CO O H-\ cotoco cr.cr. rH_:H-ONtrNN-N OJN^L^>COCM rHl3-r-^u-N onnn,c~-hno 1,/J CM NO rH LfN pvJ--0 rOC^ LfXO O N~Mj-. f--0 OJ ifNC— ONOnOOO O r-i i-i r-i r-i V^^r^ O ON O LfNO LfN(7\ OJVO r-i UNON o CM LPs c^ cr> OJ r^ OJ OJ OJ OrH_d-C— rH LfNO LTNOnO ^0\tC\CQ OJ CM-ii-t^ONCM C^CM CNr~-Lr. •-{ C^c\|co_:J- [:~-rHNO O LfN J-C--o-'C\J-cJ- ^^-C^-LT LfN _ij-_zTLrNNOco O'-O CMco.^ 0_J-ONrO.O ^-c^•'-'_^o Lp>LfNNO ^-x: O roC^CM C^ rH C— k>Ono fOvC^Oj l>-rH ONrH-^JNO CN vO C--C--|>-[>- OJOjnjCMOJ OJCMOJOJCM ojojN.rr.N", NNrfMO»K>rC\ ^^^^<^^<~^N^^<^ ^r^K^N^^r^K^ hOrtAKNN^, rr, hr\rr\KNN"\rO. NN»KN^rNh(Arf\ M C— .J-rH cTnCO O t^-::tO C— 0\tc\..x) rC\V~~ tr^O OJ Lr>C^ NO C~-C— t-^f- C-~-t"-C0 O OJ ^j^rH CO NO KN OJ r~-rHNO i-i o f\j ir-c— o CO CO CO CO cr- _J-C^rH LfNO o C~-LrvcM o so O LfNO lTn CM Lpr^O CM cr. ON ON o o C--LJ-NOJ O CO -ct■^-a-^f^J^ O O O i-t r-i CO NO LTV^KN LfNKNrH CIN^~ trsco ro,C^oj r-ONOj^r- rH rH CM OJ OJ OJ OJ OJ K>»_:j- Lr\N-\rH ONt~-- r— OJ C~-rHNO ONOJ-d-^-CT OJ K%f<\KM^\ LfNKNrH OCO rHvO HnD O oO-d-t^cr OJ NO CJNrr\NO O vO.jj-rorH o IPO LfNO LfN -itr^ONCM-d- ltnlTnlTvonO OJ OJ OJ fM OJ OJ CM OJ OJ OJ OJ OJ OJ N^^^^ rr\rr\rr\K>N~\ ^cs rr\ ro\ fo* tc\ ^r^^^^^^^^f^N^ t-i^ o r\j-d^~ON o ONCO ^-NO g>oocococo o o o o o NO LTNX) C\i~Zt CT MNCrCOCO C-NO N^CM OJ rH^ t^O N-\ NO lr\J:t-d■^c■^ CO CO CO CO CO o o o o o fM OJ (M OnO O ^f^^-^H C^ -dN-o o wd-ON NO OnCMnO CJn .^^-CO_d-K> CM ^-CM C~-rH NO hOvoj i-i CM K>(>-rH ITNCN On^O'T) C--NO o oo O O NO f-oo o^.o CTnOnCNOnO rH OJ hrvdiJ" o o o o o NO C^-CO OnO O O O O fH ,_^LfN NO C-- CO ONO r-i (M KVd" LfN OJ OJ CM fM OJ NO t-co OnO (M CM OJ CM K^ r-t OJ K^_d-LJ^ pr\N>rr\K\rr\ NO C^-CO OnO I Iw _d-cu ONi/xo ^o^rv) OJ ry O_3C0 CM NO ONr-( KNnOCO OJ KNKNrfNrrN 0\i^r-i O LfN HMJXO rH_d" 0_dCO NAt^ ^-^ N-,Lf~XX) O _d J -d-_d- LP NO O O P CO KNCO fCVX) rHsO O LPvC ^ KNLfNQ^ O CM LfN LP> LPvVO VO O n~\OnX) on LTNrH C^^rH -dpNKNOO KN LT. f— O CM LfN ^Ovo c— t— r— K^cJN^-*oco ON^J3-d"0j o C— CM ^-CM C^ r— o OJ LTNt^ £r—-0 X) CO -O o_d-o ^-^ CTN (T-^sO _d" N^ r-\--4J rH^O rH O OJ LPC—O ONO^cr-o^o NNKSKVd't^ CM »-< O CJnCO vO rHvO O LfN OJ lt-C^O cm O O O rH rH ONCMNO rHNO t^t~--vONO LfN O LfNO IP>0 lTsC^O (M lP i-H rH fM OJ OJ rHNO KNONnO LfNJ-_d-KNKN LfNO iTNO ITN f^O OJ LfNC^ CM KNKNKNKN HfM (MCMfVJOJfM OJOJCMOJOJ CMOJOJCMOJ IW m_d-o KNcxj c— trvo LT c^ _dNOCO rH_d- NO_d-(M rH ON _4-3-_d-_d- KN 7h rH rH H rH NO LfXO MNrH N->_dONONKN iJO CM NO rH C— C"-NO^KNrH K~\K'vKNKNKi r-i t-t f-i i~i r-t O OCO LfNO r-i KNCO 'X) OJ K\o>Lr>oj o O O C^-^ LfN K-.OJ OJ CM OJ -H C--CO (MCO OnCJNNA rH rH t— UTv-d '^ ^ OJ KNfM rH O ON OJ OJ CM OJ H f-t t~i r~i r-i r-^ LfNCVj OJ LTnO i rH OJ J LTvd- ONCO CM O OJ U) On K\ CTN V— CM KN Lr '-O CO KNCV) r-\ O CI-. M rH M rH O f^ C^O Lp.oj I O H ^lT'-J r-i Q ,( O [""-NO -^ O O O o o KNfM CD OJ WN OJ tPo--NO„d- _-j-r^o_^ J LTvrr-tKNfM o o o o o '-0 rH^KNl^_d- _d- LfN 3 CM ■ O OJ NO O LP. ON OJ rH rH O {JN O O O O o- rH rH rH rH O t^-d-_d-ONX» ONKNl/NrHCO OnO O KNK^ KNKNLPC^O CM OCO NO LP. LpMi^^_d-_d- o o o o o o lr^_d■ON^- 1-^ OJ CTNLPCO,^ OJ C^O ON LfN 3co^fo-NNO KN rH OCO C^ ^_d-d-KNK^ o o o o o NO r—o onon o KNrH a^f~ KNrH c;>*JD C^ \0 LP'K\C\J r-t KNKNKNKNKN O O O O O NO LP>\OC0 O CM I-H (M KNKN IPiC— KNKNC^ C~-t"-CO ONO O OnX) F-t>- _d-(M C^KNlP. COCO o_j-c— _d-Li^o c^c-^ OJ J-t^crNfM sO LrN_d'K\KN OJ CM CM OJ OJ o o o o o ONrH C"-NO C-- (XI r-O'JD ON OnO lT lPCO nO O .KN^-rH CM rH rH O O OJ CM OJ OJ OJ O O O O O C^C^I>-CO o CMNO O KNLfN _ZJtH rH (M LP> nO rHNO t-i-^ CT.O COCO c^ LPNO lP,^t^ K\UO t' - LP LfN ONO_d--d-LfN OJ ^-KNONL^ IS^ONO LfNLfN OOOOO OOOOO C^OnnO knlP ctnnono X) r-^ r~- rH ^ OJ O rHO_d-»H O U-N_-t3-.d-KN r-t >-\^ H rH OOOOO HH ^OnO cr«LfN_d" KNC— CM OnI-- KN_d-^ E--ON f—ONrH KNLP- NO NO r-c^c^ NO CO OJnO o NO NO CO O-d" r-i KNLPCO O CO o oj-d^- t—co CO iX) CO CO KN r^^NO ^d" CM LP r-O K\ 0^,rH KN^OCO CO ONOnO-. (Tn knC^c^^c— KNOJ r\j KN_d" --0 cr^oJ iT-co O OJ iPiC^CTN OOOOO t~-KN_d-0 CM NO gnOJnO o rH_d-X) r-i LP. CMld'-^ C^.rH rH rH rH rH nj OnOnO t*-rH _dO U-^r^CO 'X) OJ LPONf\J KNnOCO O KN f\J OJ OJ K\KN O OJ O^CO CM lpncm o^^~^J^ NO O K>C^rH iT^CD O OJ LP KN-KN_d--3--d coco rH^O ir\ _d'K>f^ ^fM OJ LP■0'^^*^^^rH c^o .f\i-dt^ _d"-:r ITS LP LfN sO OnO lPnO (M KNKVd-LP LPfjNKNC^rH 0>'-H_dNO o-^ lP-^O nO no ^O OJtMfMOJOJ OJiMOjrXJOJ OJfNJOJCMCM OJfMfMfUOJ CMCMOJfXJC^J (MiNJCMOJOJ iw K\ o -^_d ON c^vd-.d- cr^ t^ C0_dO C^^ OJ rH O ONON LP ON K\nO O _dC0 CM LP ON COOKNlPCO OOJLP^t^CT HPnnO nOnOnO C^C^t — t^r- OnO LPCO_d" KNlPsO C-nO COOJCOnOvO COrHvOKNrH rHCM LPCO K^ O O rH OJ_d nOCO rH KNnO CT^KN^O 0_d' 'X) KNt— OJ C^ OJ t— CM C^KN _d^.O C\J ^O O J"CO KnC— rH l/NO^d'O'.^'^ r~-OJNOrHLP O^a KNCO CM-d'C^CTNfM -3^^ (y\'-i^ no ONrH K\NO d) r-i KnnOCO rH K ifNCO O COCOCO Jn On CrsONCTsO O O O i~i t-i i~( rHCMOJCMOJ KNN",fr.KN_d ONt^LPU-NLP NO ONCMnO r-\ rO_d-OsOfM fX)_d<-H t^_d- (Mt^OjNOrH lPO LPCT^^ KNlPCO O K^ LP.X) O OJ LP _d"-d'-d" LP LfN tTN LP\J3 --O nO < OJ OJ OJ CM OJ CM CM OJ OJ fM OJ OJ OJ CM CM fM CM CM CM CVJ OJ CM C\J CM OJ CM CM ►Jl' KNCO CNND_d- »H t-i KNC^OJ C^-d-fM '-^f>J C03-OnO OJ C\J CM C\J rH H CM OJ OJ OJ CM f-i CM K\JLP LP LP^ LP' LP IP fH LPfxj rHCO rHNO CM LTVd coj-rHco_d- f-i^-^ '--i.^iu> KNNOO_dO C--_:J-rr\cM CM co_d-rHr-.d- oc-_d'-K\ K\lP<:0 r-i LP LPOj a>^--d" C^t^-NO\ONO NO c~-co cr^o NO NO 'sO NO r— K\NO_d'^ o r-i IP.VJ3 K C>- O LfNtHCO U~- CM ONt^^3-CM vO lP LP i/nlP r-i OJ KVd'LP^ CM KNiH lPoJ rH C~-On tP'NO CM CM t^ KNCM rH O O rHcM-d'^CO oco^£j_df\ ocoNO_d-oj tPvd-_^l_d-_d- _d K^ H^ »<> N^ rH rH r^ rH rH (H rH »H rH rH NO C^-CO O O rH OJ KX^ Ln c-t^r^c-co cococococo pj-du^i^oj ^_d"C^fMO NO cJnnO t^CM O OJ r— ^oco rH_d^X) C\J C^ fM^-CMCO-d rH ON C^-nO J- KNrHOCOt- KNCXJ CMCMCM fXjCMOJrHrH i~i r-i r-i r-i r-i r-i r-i r-i r-i r-t NO tXO (TnO CO CO CO CO CT^ r-i C\J KN_dU^ CTn CTN CT\ CTn CTn 16 ltd I u oo o o o o o o o o O lT O lTvO o o o o o o o o o o o o o o o lT'O lTnO lTi 1.0 0\r-\ ITSO ooo o o o o o o o o o o o o O ir\0 lTaO a^o^a.o^o rH OJ N^V^J-O L^^_J■K^(^J r-i ^- 1-- 1>- C^ [-- o o o o o o o o o o o o o o o o o o o o LTNO LTNO it- _ri-OvO c\j OJ O Lr^lH O OJ NAMD n\t<\co i>-i>-c— ^-t^- o o c o o o o o o o o o o o o o o o o o O LT-O iTsO Lr-[>-0 Oy Lf> o o o o o o o o o o o o o o o ltno Lr\o Lr> t~--o c»a LTvt^ sij vO t^ C^ C— C--CO JD -O CO O O LTOj t-— LT OcO 0_U- N ■ OJ OJ OJ iH o o o o o CO r-l_^-^ LTv r^ f\j Lr«c~-o f\j o o o o o o o o o o O LTsO iTvO d^r— O OJ ir^ OOOrHrH f-(iHOJ nO rcvrr\ rH OJ t--o_y-ov^ O CTNt^u'Vd' OvjD CO r O CO •O vO "O ^O ^43 O O O O O rH 0_-J- CO »-* ^O rH -i) OJ cr>Lr^ojvO OJ rH rH rH O O O O O o o o c o o J-OnO^^.jD OJ '-0 ^-O fO» rH t-'^'-HCO L/^OJ O O CT.ONON w .rooj OJ OJ O O O o o o o o o o rH CO rc\t--X) ir\\o rr\_j-0 O c^O^O^O CMTNOJ C^t^ ODCO O ^-C- t\i OJ OJ OJ OJ o o o o o o o o o o O C^OJ^O rH O LfVrH fOrH o r~-^£) o^o O O -D CTstr\ LT'fM 0(0 C^ OJ OJ OJ rH rH O O O O O O o o o o O CTv:J-rH\D O LfN O O o o o o o o o o o o o o o c^o_cfoo N^ OJ ctnOnoj cr« N-\oi f\j_:J-^^ o o o o o o o o o o o o o o o OJ^fvO O -M rH O^r^LOJ- KMT f- O OJ C OnO o o _d-c^o j-r- oj O c^C— LP. LTstr-o OJ LP- O O rH rH rH i-t lPCTsKAOD _zJ-OJ O ONf- oD fO»:o OJ f>- t—O OJ L/Nt^ rH ,-\J OJ OJ OJ OJ O rH rTN^ ^f \ O cO C-- 1^ vj3 LrM>r\oj r-\ OJ 1>-(M C^OJ Lr\r— o OJ t/> rOvO K\0J^J3 CO o OJ uNx) O O OM-O ^~ C^OJ^O rHvi) ^-o OJ u" c^ OJVO rHS£> rH r-l'-O rH'-O r-f O Oj lP^-O T Ln-m lT LP-LTM-Tm LnLTM/^u^u^ LP-LP^iD^'^ Nor-r— f-'C^ gococo'X)c> rH ONCTMi^OJ C^r\l„0 K\fr\ -TT-d-N^rHsD sO rH'-D O OJ OJ Lr\[~— • • • • • oo a.C^^O^'H rH CO lt^oj on^^ CNJ OJ OJ rH rH rHsO rHvX) rH LPt^O OJ Lf^ rH O O O C^ O f\j l^^t^- O rH rH rH en < Eh o OJ LT r^o^ OJ rH O a CO r-^ rOvOCO <-H c o>o-c^o ■ O C— J3 iJ*N lPn '"O kvj:) k>' o hPvvOcO <-H rOv O O O rH rH _d-t^O ^^^^^ 3'^<>'^f\l "-H fC\rO S"\cO "^ X) OD rH rTN^ <-H rH OJ OJ OJ O OM3 [^OJ iP-axKAcO-^ OJ rH rH O O r-t\0 rH^JD rH LTNt^-O OJ LP O OJVO K",C\J O^O OJ O^O O OCTsCOCO •O O lPO LP' C^O OJ LPC-- fTN^sO rHCO LP rPv O CO LP fP* O LPO IP'O O OJ iPt^ O _-j-lP lPLP^lPlPlP lPiPslPlP-lPi lP.u^v£)v^nO vOt"~r^C^C^ COCLtCOU^O^ r-^ovo o LP lP«0 lPO OJ OJ L^^^- • • . . .o o O^CT^O^rH rH rrsrHOCOC^ ^O _d- N~N OJ rH ^O^O*^ LP LP lP^lPlPLPlP O iTvO lPO lPO lPO lP> Lr\t>-o OJ LP. c^o OJ LP t~- O O rH rH rH • rH c\j OJ r\j r\j OJ ojcD c^•Lr^ CO [^ p^ LP LP- rH cr r~--o LT-- a")_l' rHCO LP vD^i3>JD LP LP\ LPlT lT LPlP o o o o o ^ OtJDCO O QD Lrv:H-C--_d- j-_j-!3-j-Lj^ rrM^tP\oj OJ LP« lP> LP. LP. LP O O O O O O O lPKnC^ O cr-^±C0^-D O rH LP t-^O Ovo_J-_::tNO O c~~ir^K\t~i o o o o o C lPO NACO OrH l^_cf(\J O -JD K".rHCO 0_ziO C-- H- oco f^ip3 -z^hP.K rrsKA o o o o o tc\f~i O OCO fTsCO O t<\r^ fPiLPLPO rH hT^OJ OJ rP,_:J- N~\OJ rH O O^. hr\hPrc*fp\OJ O C O O O _:iCOOGOO H C^r^lPvrH C-t-OJ r-i^ lPC^ O r^\sO CO C — [^^J3 LP OJ OJ OJ OJ OJ O O O o o O OJ lPCO KN OJ >~i^O KNOJ O O ON LP C^ OJ O-^O fCiCO O CTnO iP-OJ OJKAC-»C\0 o KAco OJ t^ ftj r~-ojco_d' LTvJd" tPvKNOJ OJrHrHOO ojojojojoj ojrvjojojoj OOOOO OOOOO IJI- ^^ C^-CO onO rH OJ rP^^LP. \0 E^-CO On OnONOnOnOn CTvOCTvOnO ^o r^xi a\o fVJ OJ OJ C\J KA *HOJK>_zi-LP 'sO C--CO ONO rHOJKVctlP. K\KAfO.»OKN K\KNrr»KV::t -z}-_jd'_:t_3'-d' ^o c-co o>o «1 rH llw rHO O O O OOOOO lP-O lPO lP. OJ lTnC^O OJ LP^LPLPn^^ OOOOO OOOOO O LPO LP>0 LPiC^O OJ LP OOOOO OOOOO LPO LT O LP t—O OJ iP.t^ O-UDCOCOCO OOOOO OOOOO O LTNO LP-O O OJ LP'C^O O^O^CTnONO OOOOO O O O o o LPO LPO LPi OJ lP^ C^ O OJ O O O rH rH OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO O LPO lPO iP*0 LPO LPv O lPO LPO lpc^o OJ LP. r~-oojLP.c^ o OJ LP\C— o rH rH OJ OJ OJ OJ rP\r0.tC\NA _z}--d'-d'-^ l/^ o o o o o OOOOO LP>0 LPO LP. OJ LnC^O OJ LP- LP LP'"'^ "^ ^p.N■^K^^p^^P\ K^K^^P.^^\K^ KM>r\fr»rrNto, NA KA K> rr\_d- -d"— OJ o I:j iH rHvO LP.LP LPcO-d--::l-l>- lO -jj„-j-oj O C O O O o C^O hPxLPiT^ rr\K\LPO J3 rH t-TMPvJD O CNt-^Lr>rP\oj ^r^^P^^P,^<^^p^ O^ OCO CO TO OOOOO _^<7NrH O rf\ ONf\J ONDD ON rP.r~-O_d-C0 O .o t^u^ rp\ ^f^OJ OJ OJ OJ CO i,XJ ^-O rO (-0 OOOOO rH_d-0 ONrH rP^O-OJCO OJ rPvC^oj t— hP. OJ O ONt-^i) c\j ~t 1-^ r-\ ro G3 CO CO ':o OOOOO _:J-Ov0^rH C^LPuzf^J^ O K^D-J-O --O N-% ^NA^ O CN r-t r-< <-{•-* vO rP.O C— f~-vo Lr\_ctoj OOOOO lOiOCOCOCO OOOOO LP\OJ tXO LP OJ ONf— C^CTs lP\OJ 0>XJ'-C» rH o c^^-NO o o (T\o\(y^ coco c^[--r-- OOOOO CO r^rH ^ IT' OJ t^_;toj i-t lP.rP\OJ rH O iPvd-NNOJ t-i 0''^CT^Os On ON OOOOO hPvo i»p\fc\r^ O^CO C~-^j3 LP CO CO CO CO CO OOOOO OJ ONfPvONrH OngnO onCO vO CO KNTD '-0 OJ hPLPvOCO CO t— O lPvJ- lP.lPlPlPlP OOOOO OOOOO rPvOco r-i LPv _d--OCO-^ (Ts NO C^O LTNrH o OJ LPr— o ^KNCNJ I-i I-i LP LP LP. LfN LP. OOOOO OOOOO CO OJ r-i^r-\ a . c. o OJ ^jD OJ LP.ONOJ IPN O crvX)aj t— vOvO_^C^-H OJsO KNOJ_;+ ^ C— iP^Id- ONOj^o o_d^ C^oj o Lp.rP\ LPCO rH vD OJ iVJ OJ ^- rH ^O r.r>N'\OJ OJ r-t OOOOO O O C O O OJ_J-LPK>_d- r-t ON^-Lr^oJ CN~-0 LPVLPM3 O LP.O iPvO rH O O ONON _d--d-^fONN OOOOO OOOOO t^ONCO OJ ON X) rPit^O Q C~-0 rr\co r^ LPrHNO r-i t— COUD C~-[--^X> ^p^^p^K^K^K^ OOOOO OOOOO c--_ifco t^o cr>o O OJ OJ CO ir-tf\r~i o ojcO-rtONO v^ lPlPlPvjij- ^fM■P fPv NN N". OOOOO OOOOO L^^O_ CO OJ oj o- f^ CTnO rH OJ LP rH CO -J-O^O -JN-NNANNOJ ^'vONO NO rPvO f~-_J- ON-j-ONrP.CO KNnOCO rH KN ONONO^O O r-co aNrH_t rHCO LP^PO NN^~f\J t^OJ vOCO rH K\N0 Q O i-i i-i t-^ NO O I^C-- rH C^lPOJ OvC^ NO rHNO O LP CO i-t rovN£)co rH (\J CM OJ CvJ NO rHNO OJCO _d-fM ot^J- o LP- a v-J- cr. rH NN LP. O O rP,rriNNr uP-LPlPM/^LrN nOnOC^QnO OJ O C— iP^^P rHLX)NO_^fM O'TDNO^oj OcONO_rl NN, _d■C^^^P^CO rr\ CO OJ C— OJ C^ OJNOrHNOrH -sOOlPOLPn m^lTncO O nn LPCO O KNLP CO O ^P\ iPCO O rP\u~vCO O _ J-_^_d" LP. LP LPU-^NOvDNO NO C^C^t— C^ COODCO-L'ON rr\ .f . ro ro N^ na kn fr\_d-_:t ^^^ t-H CO-J-ONOOJ COLPOJ ON'O KNrH CO NO _d- OJ rH OnCO t^ O Cr-r^ NO LP_rtKNOJ NO o LfN o LP. o lpo lpo Lp.cr_j- c^^d" ON-rt ON-it ON rH_jjNO ONrH _;iNO ONrH-d" NO CO rH KNnO CO iH r> cm '^ t^ knno j- o^ o-^i^no KNlPOD CM C^ CM ON^-O^+CM OJ OJ CMJ^nO (TsCM'^rHNO CMCOU^fCM OJ CM rH rH O O nOnO -OnOnO n^nXJnOnOnO OOOOO OOOOO O^fMCO^ LP O O KNrH rr\ _d<0 CM t^fM CM CO ON rHCO O OCT'OnCC nO IP LPLTNip, OOOOO UMrs_d- CM CO O^O^tf\i-i CM P-NNO r^-d" _rJ-'H CO _d-rH COCO t--c— r^ IfN LfN IP^ l^^ LP OOOOO CM f-i r-t ^-o r-co ono CO CO CD CO CO I lyil'yiRSITY OF FLORIDA 31262 08106 507 UNIVERSITY OF FLORIDA ' !' DOCUMENTS DEPARTMENT 1 20 MARSTON SCIENCE LIBRARY RO. BOX 117011 GAINESVILLE, FL 32611 -701 1 USA