Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 450
he teacher, is central between the doors,on a platform, P, raised some six or eight inches above the floor. Inthe rear of the teachers desk is a closet or small room, for the use ofthe teacher. The seats are arranged two to each desk, with two allcj^sof eighteen inches, and a central one of two… … ELEVATION ■03FI.CO. OSBOnKES /flOCfT.S.S IM.ATE LXXlll.