— 198 — 
The bill of material x, gives tlie number and size to order, of articles required to 
be furnished to satisfy that drawing, and is made as follows, for example : 
MATERIAL FOR TWO CEANES. 
No. 
DESCRIPTION. 
LENGTH. 
MARK. 
2 
Forgings 
A A 
6 
Angles 3" x $" x 
6 f ir 
AB. 
4 
Plates i2 /J x f v 
7 f H" 
AC. 
12 
Bolts. .H. H. and N 
6 ダ 
AD. 
16 
V Tap Bolts. H. H 
ir 
AE. 
ヰ 
V Bolts. CK. II. SQ. N 
AF. 
Thö marks A A, AB, etc., are shown on the details to which they refer. 
ix is adopted to givo each piece a mark to distinguish it readily from other 
articles, and also to assist the formation of x, as the bill x is a better arrangement 
than the old plan of marking off on each piece tlie number required, as it slio'vs tlie 
workman readily all that is on tlie drawing for him to make, and enables him to see 
at once wlien lie is tlirougli with the work shown on the drawing. 
Tlie title, xi, should be in the same relative position on all drawings ; preferably 
the bottom right hand corner facing tlie drawing, as this is the most convenient ^ or 
reference when filed away in drawers or rolls. Wlietlier the tittle should or should 
not give tlie name of the firm or work for wliich it is for is an open question. Thß 
advocates for tlie affirmative say it is easier to remember a name, because move 
interesting, tliau an order number ; whilst the advocates for the negative say such 
information makes tlie work too public in many cases. 
xii, The signature, preferably initials, of the draughtsman should be given 〇 11 
tlie drawing to facilitate reference to liim sliould. any question arise. 
After tlie tracing lias been signed by the draughtsman let it be, 
IV. Examined or chocked by another draughtsman. In this examination 
every dimension and note on the tracing is to bo examined ; and all the necessary 
dimensions and information for tlie workman shown to be on the tracing ; and the 
fact ascertained that no two parts of the work will foul with each other. 
AVhen the examiner lias satisfied liimself on these points, his signature on the 
tracing is lequii’ed to attest tlie fact, which signature is a guarantee to the foreman 
that the tracing is ready to work to. 
Sometimes the tracing is made and examined by one and the same draught 8 * 
man. lliis is a quicker plan than tlie former, as the draughtsman is more 
with tlie woik on liis own drawing, blit it is not as safe, as the draughtsman is liaW® 
to make tlio same mistake twice over. 
After tlio tracing has been signed by tJie examiner let a 
V. Blue print bo taken 11011 1 tlie tracing and sent into the shops to tlio for 61118 
engaged on the work, or to the “work’s manager, as tlie case niay require. The 
