/ A* v/ \y ^<^ j \ CHASMA&3T WINCHLL4. NtWYMJt P1TTSBUKO A. A J O 77? c O , v: j: Copyright 1900 by Warner & Swasey, Cleveland, Ohio V ' Astron. Dei ASTBONOM? DIPT. THE WORKS OF WARNER d. SW ASE Y Introduction ' I ^ H K number of leading observatories for which we have designed and made astronomical instruments affords us an opportunity to bring together a series of illustrations which we feel will not only be of general interest, but also of service in showing the magnitude and completeness of modern astronomical equipment. We feel that the illustrations speak for themselves, and it has therefore seemed to us that a mere mention of some of the instru- ments and observatories would be even preferable to elaborate description. The objectives of the three largest telescopes, those of the Yerkes, Lick and Naval Observatories, were made by Messrs. Alvan Clark & Sons, while the objectives, and, in fact, all the optical parts for the other instruments shown, are from the works of Mr. J. A. Brashear. We are glad to acknowledge our indebtedness to the astron- omers of the several observatories for their courtesy in supplying certain of the photographs here reproduced. WORCESTER R. WARNER AMBROSE SWASEY R. M. HUNT ARCHITECT PRIVATE OBSERVATORY OF MESSRS. WARNER & SWASEV Plate I Plate II 6-INCH TELESCOPE FROM THE WORKS OF WARNER & SW ASE Y 8-INCH TELESCOPE FROM THE WORKS OF WARNER & SW ASE Y Plate III 12-INCH TELESCOPE Plate IV FROM THE WOKKS OF WARNER & SWASEY * POSITION MICROMETER FROM THE WORKS OF WARNER & SW ASE Y Plate V \ STANDARDV,HRbNO<5HAt>^ ' '' , * T FROM THE WORKS OF WARNER & SW ASEY Plate VI 3-INCH COMBINED TRANSIT AND ZENITH TELESCOPE FOR THE UNIVERSITY OF ILLINOIS FROM THE WORKS OF WARNER & SW ASEY Plate VII 3-INCH UNIVERSAL PRISM TRANSIT FOR THE UNIVERSITY OF PENNSYLVANIA FROM THE WORKS Or WARNER & SW ASE Y Plate VIII 4-INCH ZENITH TELESCOPE FOR THE UNIVERSITY OF PENNSYLVANIA FROM THE WORKS OF WARNER & SWASEY Plate IX Plate X 5-INCH ALT-AZIMUTH FOR THE U. S. NAVAL OBSERVATORY FROM THE WORKS OF WARNER & SWASEY 6-INCH STEEL MERIDIAN CIRCLE FOR THE U. S. NAVAL OBSERVATORY FROM THE WOBK9 OF WARNE R & SWASEY Plate XI 4*1 * _ , . .V. : :: ' ::.: :*. " r;. STEEL MICROMETER FOR THE 6-INCH MERIDIAN CIRCLE OF THE U. S. NAVAL OBSERVATORY FROM THE WORKS OF WARNER & SW ASE Y Plate XII SOME ASTRONOMICAL INSTRUMENTS MADE FOR THE U. S. NAVAL OBSERVATORY, UNIVERSITY OF PENNSYLVANIA AND OTHERS IN THE WORKS OF WARNER 4. SWASEY Plate XIII ::.>.: ; : :. - 40-INCH AUTOMATIC GRADUATING ENGINE MADE AND IN USE AT THE WORKS OF WARNER & SW ASE Y Plate XIV A. W. FULLER ARCHITECT DUDLEY OBSERVATORY, ALBANY, NEW YORK 12-INCH TELESCOPE FROM THE WORKS OF WARNER & SW ASE Y Plate XV OBSERVATORY OF THE SYRIAN PROTESTANT COLLEGE BEIRUT, SYRIA 12-INCH TELESCOPE FROM THE WORKS OF WARNER & SW ASE Y Plate XVI J. W. STEVENS ARCHITECT THE QOODSELL OBSERVATORY, CARLETON COLLEGE NORTHFIELD, MINNESOTA 16-INCH TELESCOPE, AND 17 AND 30-FOOT DOMES FROM THE WORKS OF WARNER & SWASEY Plate XVII EDGAR V. SEELER ARCHITECT THE FLOWER OBSERVATORY, UNIVERSITY OF PENNSYLVANIA PHILADELPHIA, PENNSYLVANIA 30-FOOT DOME 18-INCH TELESCOPE 4-INCH MERIDIAN CIRCLE 4-INCH ZENITH TELESCOPE 3-INCH UNIVERSAL PRISM TRANSIT FROM THE WORKS OF WARNER & SWASEY Plate XVIII R. M. HUNT ARCHITECT U. S. NAVAL OBSERVATORY, WASHINGTON, 0. C. 26-INCH TELESCOPE 45 AND 26-FOOT DOMES 6-INCH STEEL MERIDIAN CIRCLE 5-INCH ALT-AZIMUTH, ETC. FROM THE WORKS OF WARNER & SWASEY Plate XIX R. M. HUNT ARCHITECT THE U. S. NAVAL OBSERVATORY BUILDING IN WHICH THE 26-INCH EQUATORIAL IS MOUNTED. TELESCOPE, ELEVATING FLOOR, AND DOME FROM THE WORKS OF WARNER & SWASEY Plate XX 26-INCH TELESCOPE OF THE U. S. NAVAL OBSERVATORY Plate XXI FROM THE WORKS OF WARNER & SW ASE Y 26-INCH TELESCOPE OF THE U. S. NAVAL OBSERVATORY Plate XXII FROM THE WORKS OF WARNER & SWASEY DRIVING CLOCK OF THE 26-INCH TELESCOPE OF THE U. S. NAVAL OBSERVATORY FROM THE WORKS OF WARNER & SWASEY Plate XXIII WRIGHT & SANDERS ARCHITECTS THE LICK OBSERVATORY, UNIVERSITY OF CALIFORNIA MOUNT HAMILTON, CALIFORNIA 36-INCH TELESCOPE FROM THE WORKS OF WARNER cS. SW ASE Y Plate XXIV 4V. V: . . . . . - : !.* :' ;:,*, 36-INCH LICK TELESCOPE Plate XXV FROM THE WORKS OF WARNER & SW ASEY 36-INCH LICK TELESCOPE FROM THE WORKS OF WARNER & SW ASE Y Plate XXVI EYE END OF THE 36-INCH LICK TELESCOPE FROM THE WORKS OF WARNER & SWASEY Plate XXVII THE LICK OBSERVATORY IN WINTER 36-INCH TELESCOPE FROM THE WORKS OF WARNER & SW ASE Y Plate XXVIII HENRY IVES COBB ARCHITECT THE YERKES OBSERVATORY, UNIVERSITY OF CHICAGO WILLIAMS BAY, WISCONSIN 40-INCH AND 12-INCH TELESCOPES 75-FOOT ELEVATING FLOOR 90, 30 AND 26-FOOT DOMES FROM THE WORKS OF WARNER & SWASEY Plate XXIX 40-INCH TELESCOPE OF THE YERKES OBSERVATORY FROM THE WORKS OF WARNER & SWASEY Plate XXX EYE END OF THE 40-INCH YERKES TELESCOPE FROM THE WORKS OF WARNER & SWASEY Plate XXXI EQUATORIAL HEAD OF THE 40-INCH YERKES TELESCOPE VIEW FROM THE NORTHWEST Plate XXXII FROM THE WORKS OF WARNER & SW ASE Y EQUATORIAL HEAD OF THE 4O-INCH YERKES TELESCOPE VIEW FROM THE SOUTHEAST Plate XXXIII FROM THE WORKS OF WARNER & SW ASE Y .', L t~* .. *. ; y * * ! * * * 2 .:..- :i'| Js s> ^ >* v|i: r 3 r ^ ** "" % - d tf E jt4j !|y 'i L .. 1 I n j r" 40.NCM TELESCOPE DOME A 75rr ELEWNC FLOOR FOR THE YE'.RKTS CGitnvATORY Plate XXXIV Plate XXXV TWO VIEWS OF THE MICROMETER OF THE 40-INCH YERKES TELESCOPE FROM THE WORKS OF WARNER 4 SW ASE Y THE 40-INCH YERKES TELESCOPE AT THE WORLD'S COLUMBIAN EXPOSITION, CHICAGO, 1893 Plate XXXVI AS EXHIBITED BY WARNER & SW ASEY sf ^ a '*=> 14 DAY USE RETURN TO DESK FROM WHICH BORROWED ASTRONOMY, MATHEMATICS- This book is diSTAWST45 at kl i Ky?BV beIow ' or on the date to which renewed. Renewed books are subject to immediate recall. 200r \&&&> LD 21-40m-5,'65 (P4308slO)476 General Library University of California Berkeley f*'A V^? /L5TRONOMY L1B8ARY