199 
n arne of blue print should be entered in a book with the name of foreman sent to, 
üc elate on wliicli it is sent. These particulars are useful to refer to, in case of 
investigation being made into any delay in the proceeduro of the work. 
the blue print is taken directly from tlio drawing made on thin, semi-trans- 
1 clrawiiig paper for tho purpose, the reader will readily see the slight modifica- 
tions to be 
made to the preceediug remarks 
1 Tlie foregoing process may appear at lirst sight a lengthy one, but as it lias 
ouxied witli the primary objects of secTiring great acciu.ftcy and dispatch in 
thi ac t ure ， ifc is believetl that sliglifc excess, if any, in cost of drawings made by 
(心 ^ an ^ doubly repaid by the saving in cost of mainifacturo. Ir' however, two 
l ^ing s giying the same iuformatioix and of equal efficiency are produced, ono 
£ ア tlao above process and one made by any other process, it is believed the 
〔ご 1 he made in less time, aud with less labor, than tlie latter. The principle 
lu o °ne thing at a time is adopted throughout, and tlie practice sometimes 
of finishing and tracing one part of a drawing before anothei* part is coin- 
gQ ls, ln this liglifc, obviously Avrong, unless there are especial reasons for doing 
II. —RULES TO BE OBSERVED IN THEIR PREPARATION. 
ne Put as little as possible on drawings, to prevent confusion, but everything 
iy for tlio construction of the articles represented, 
etc • nnecessai T details, fall or dotted lines, circles, shading, dimensions, notes, 
j ra 0 ve a waste of time for both draught man and workman, besides making tlie 
a c | con fusing or more unreadable. Everything on the drawing should liavo 
^ ac üit*it^ 叫 れ〇 わ 0 tliere, so that if dimensionse tc., are repeated, it should be to 
Ujj l , e ^ le workman iu uuderstamliug the drawing or in avoiding a liability to 
^ し Oftnn rl vivil rrli 1 1 1 -PiTwn wnnf +1 imifrltf. nv IS 
SaTo PleasaQt 
Often draughtsmen, either from want of tliouglit or because it is 
occupation, draw in detail, rivets, bolts, etc., where centre lines 
stood l) e (l ua lly as well. It* the drawings were to be pictures intended to be uiitlei.- 
case • グ マ 10 uu ^ ra ^ uec ^ mind, such details would be necessary, but sucli is not the 
l，e prcseut Un g drawings are made up of a series of symbols which are understood to 
sfcaiKj a CGlta ^ u articles, materials or methods, and a workman will often under- 
W 0ll j ( | , ° e ^ le ^ ne » with given dimensions, to represent a rivet or bolt where details 
II eU \ ma k e the drawing confusing. 
yo llr 〇 1 ave dimensions to suit tlie workman’s requirements iu preference to 
cess of iri i laU ^^ Smau s h 0 uU， to carry out this rule, mentally go through the pi.o- 
make it ぐ叫 the article represented on tlie drawing just as the workman will 
wastes a workman's time to require him to add aud subtract a number 
25 
It is nu^^ 61 GaU obtained from Charles Schleicher and Sohüll, Düren, Rhenish Prussia. 
r<_Cl /8 〇 , aild OOltlPS in vr^lla trflc lnno* tn AT\ wirlA Pri Tlftr rol 
By its use 
5, and comes in rolls 33 yds. long, by 38 to 40 inches wide. Price per roll 
considerable time will be saved in making blue prints. 
J. A. L. W. 
