BY'Johw 5.Clark • ilARY Dana Hicks- and -Valter S.Pcrry THE-PRANG-EDUCATIONAL-COnPANY BOSTON • NEW YORK - CHICAGO Copyright, 1897, by The Prang Educational Co. rW iV'.-: GLOSSARY, SPHERE : a solid having one round face — a ball. HEMISPHERE : half a sphere; a form having one rounding face and one plane circular face. CUBE: a solid having six equal plane faces, the opposite faces being parallel. CYLINDER ; a solid having two equal plane circular parallel faces, and one curved face. PRISM : , a,solid having two^pJan^ polygonal faces called bases, and between these as many plane side faces as the bases have sides. It may rest on either base. -, SQUARE: one whose bases are squares. A cube is a square prism, whose side faces equal its bases in size and shape. -, TRIANGULAR: one having triangles for bases. Aright-angled triangular prism has right-angled triangles for its bases. An equilateral triangular prism has equilateral triangles for its bases. An isosceles triangular prism has isosceles triangles for its bases. -, HEXAGONAL: one whose bases are hexagons. ELLIPSOID ; a solid bounded by one regularly rounding face and having three axes, two of which may be equal; a solid generated by the revolution of an ellipse on one of its axes. OVOID : a symmetric solid having one rounded face and having one end larger than the other. CONE: a solid having one plane circular face called the base, and one curved face. The circumference of the curved face diminishes regularlyuntil.it vanishes in a point called the vertex. In a right cone the vertex is directly over the centre of the base. PYRAMID: a solid contained by a plane polygon as base and triangular planes meeting in a vertex. Pyramids are named from their bases, as triangular, square, etc., as the base is a triangle, square, etc. SURFACE : the whole outside of a form. FACE : a part of a surface unbroken by an edge. VIEWS : drawings showing the facts of form. -, TOP: the view obtained by looking directly down upon a form. -, FRONT: the view obtained of an object when it is directly in front an j opposite the eyes of the observer. -, SIDE: the view obtained by looking at an object in a direction at right angles to that in which you looked for the front view, the various parts of the object being supposed to be on a level with the eye. PATTERN : anything cut, drawn, or formed, to be used as a guide in making an object, and serving to determine its exact form and dimensions. EDGE: the place where two faces meet. CORNER; the space or contents included (within a short radius of the point of union) between faces, edges, or lines that meet. OUTLINE : the defined limits of form. LINE : the representation of length, but not breadth or thickness. M -, STRAIGHT: one whose direction remains the same throughout its length. ^ -, CURVED: one whose direction constantly changes. HORIZONTAL: perfectly level. VERTICAL: upright; straight up and down. A face, an edge, or a line may be vertical. OBLIQUE: neither horizontal nor vertical. PARALLEL : being of unvarying distance apart throughout their extent. Faces, edges and lines may be parallel. ANGLE : the difference in direction between two or more faces,edges or lines, which meet, or would meet if produced. -, RIGHT ; an angle of 90’ -, ACUTE: an angle less than a right angle. m -, OBTUSE : an angle greater than a right angle. ^ PLANE FIGURE: one having the same direction throughout; perfectly even, as if made by a carpenter’s plane. Return this book on or before the Latest Date stamped below. A charge is made on all overdue books. U. of I. Library ! tipfi -5 11148-S Fig. I is the pattern of a cube. Cut it out, fold and paste to make a cube. Figs. 2 and 3 arc the two pn^^ terns necessary for a sphere. Take them home and use them as patterns in cover¬ ing a ball. EXERCISE VI.-Model Drawing. Place the sphere on the cube and draw their appearance. EXERCISE VIII. EXERCISE XIII.-Pattern Drawing. From a Model. 13 vv./ On page A there is a printed pattern of a cube, Fig, i. Cut out this pattern, fold and paste so as to make a hollow cube. Use this for a model, and draw the pattern for a cube. EXERCISE XIV.-Envelope.-From the Object. M a.;i hia i:. Two views of an envelope are given as illustrations and not as copies. Draw a horizontal envelope, open or closed. EXERCISE XVII.-Original Border. Draw an original border, made by repeating either Greek crosses, quatrefoils or square-leaved figures, as on page i6. Use only one kind of figure. EXEF5CISE XVIII.-Nature Study. Draw an example of plant-growth from nature. •^^.^v.*-*_i'--^S.*'-ii.’i;VV; Detach tlie page, cut out the pattern, fold and paste to make an envelope. Write properly your own address upon the envelope. ^ PATTERN OF AN ENVELOPE, —Making an Envelope, for Exercise XIV.