— 196 — 
DECIMALS OF AN INCH FOR EACH, み th. 
- 3 TjCls, 
Atlis. 
Decimal. 
Fraction 
み ds. 
^ths. 
Decimal. 
Fraction 
r 
•015625 
33 
.515625 
I 
1 
•03125 
17 
34 , 
• 53^5 
3 
•c 46875 
35 
•546875 
1 
4 
•0625 
卜 16 
18 
36 
•5625 
9-16 : 
5 
.078125 
37 
•578125 
3 
6 
•09575 
19 
38 
•59375 
7 
•109375 
39 
.609375 
4 
8 
.125 
i -3 
20 
4 。 
.625 
5-3 
9 
.140625 
4 【 
.640625 
5 
TO 
.[5625 
21 
42 
.65625 
I I 
.171875 
43 
•671875 
6 
12 
• 1875 
3-i6 
12 
44 
.6875 
1 1 一 1 6 
13 
.205125 
45 
.703125 
7 
*4 
•21875 
23 
46 
•71875 
15 
•M 4375 
47 
•734375 
3 
j6 
卜 4 
24 
48 
•75 
3-4 
17 
.265625 
49 
.765625 
9 
18 
.•28125 
25 
50 
.78125 
19 
•■296875 
5-1 
.796875 
IO 
IO 
•3125 
5_i6 
26 
5 ^ 
.8125 
13-16 
21 
.328125 
53 
•828125 
li 
22 
•34575 
V 
5 斗 
•84375 
23 
•359375 
55 
•859375 
12 
24 
•375 
3-8 
28 
56 
.875 
7-8 
25 
•390625 
57 
.890625 
1 13 
26 
.40625 
29 
5 « 
•90625 
27 
.421875 
59 
•921875 
14 
28 
.4375 
7-16 
3 ° 
6o 
•9375 
15-16 
29 
.453125 
61 
•953125 
15 
SO 
•46875 
パ 
62 
•96875 
パ 
•484575 
63 
•984375 
16 
32 
•5 
1-2 
3-2 
64 
r. 
i 
The following extract on Workshop Drawings n from the American Engineer 
of Nov. 7fch the and 21st 1884, though perhaps not in exact accordance with the previ- 
ous p：ivfc of this chapter, contains so many useful hints tliafc ifc has been considered 
advisable to insert ifc. 
“ The following article is by Alfred D. Ottewell, who can speak with authority 
from a life long experience in the best shops of Europe and America : 
While eacli draughtsman has his own method, and each firm its own rules, ifc lS 
believed that the following process of preparing working drawings, having given tli 0 
general design and dimensions of the article to be manufactured, may contain poii^ 9 
worthy of the consideration and adoption of both ; being the result of an extensive 
practice and detailed observation. 
