Jamison, Alpha Pierce. [from old catalog] · New York, J. Wiley & sons; · leaf 121
I Iff _T/ -A it 11 tt tt (i = l (7) t It 3__ Tf8 ~ L J — 1 «32 t <t tt tt a = l (8) t it Iff — Tf4 —1 > — 1 *48 ( (( tt It tt = l (9) 1 it 3 ft _ Tf T6 ~L J 1 <— 6T ;t it tt tt tt = l (10) t tt 1_ Tf 8 ~ L i _ 1 < ~12 t tt tt tt tt = l (11) t It 3 ff — Tf 3J ~ I > 1 <— 1T8 c tt cc… … Fig. 55. given on the scale is the \ division of the full-sized scale; to usethis, erect a perpendicular at one extremity of the 1 line, andwith an inch division of the scale on the other extreme, radiatethe scale from this latter point until a division ij, or f awayfrom the inch division,…
Mechanical drawing
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