. Augsburg's drawing, book 2. The Horizontal Prism. The Horizontal Prism.— Hold the paper model in the posi-tion of Fig. 20, then in the position of Fig. 21, then Fig. 22, then23 and 24, and study each position closely. Observe that theprinciple is the same as with the box and the horizontal cylinder inregard to the eye. A new line is introduced in these figures; Lines 1, 1, and2, 2, Fig. 22 are oblique receding lines. Being receding lines theywill converge slightly, line 5 being shorter than line 4, and line 4shorter than line 3, because farther away. Observe, also, that the apex is over the

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. Augsburg's drawing, book 2. The Horizontal Prism. The Horizontal Prism.— Hold the paper model in the posi-tion of Fig. 20, then in the position of Fig. 21, then Fig. 22, then23 and 24, and study each position closely. Observe that theprinciple is the same as with the box and the horizontal cylinder inregard to the eye. A new line is introduced in these figures; Lines 1, 1, and2, 2, Fig. 22 are oblique receding lines. Being receding lines theywill converge slightly, line 5 being shorter than line 4, and line 4shorter than line 3, because farther away. Observe, also, that the apex is over the center of the base. AUGSBURGS DRAWING. 147. The Receding Prism.— Figs. 25-29 represent the variouspositions of the horizontal receding prisms. Hold a model inposition and compare it with each drawing line for line. Observeeach })oint both on the model and in the drawing. Aim to see andknow the principle. f

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdrawing, bookyear1901