cketts School Square. Xo. R24. ^ Tliis Combination Instrument is i)resented for your consideration, in thehope tliat you may fully appreciate its usetulness. It is designed bv a prac-tical draughtsman, ^vllo has had wide experience in teaching Drawing in thepublic schools and evening schools for… … Description. A. B. C. (see cut) is an angle of 90 degrees. B. A. D. is an angle of 45degrees. E. F. is an angle of 30 degrees to 2-3, and 60 degrees to 1-2. Thegraded lines 1 — E., E. — F., F. — 3, give the degrees of angles from 1 degree to90 degrees, radiating from point B. The graded line A. B.…
