,S YMBOLIC NOMENCLA TURE. 



117 



FPL 



TABLE B. 



No. 3 FOOT PRESS. 



Weight. 



Table B is a specimen of part of a page of our " Symbol Book," 

 in which are recorded any machines which have arrived at such a 

 state of perfection and salability as to be marked " Standard " on 

 our drawings. 



This table almost explains itself. The piece numbers in ist 

 column do not have the letters prefixed, because the latter stand 

 at the top of the column. " Same as " means that the piece is 

 identical with a piece belonging to some other machine, and can 

 be manufactured with it. If it is common to several machines in 

 a set, the smallest of the set in which it occurs is given. The 

 " quantity " column tells the number of pieces of a kind required. 

 The last " weight" column, added upward, shows total weight of 

 machine. The piece numbers are " gapped " after each kind of 

 material, and also at the ends of " groups," as described further 

 on. This is to allow for future changes and additional pieces ; 

 also that other nearly similar machines having more pieces may 

 in general have the same piece numbers. 



The order in which the pieces are numerically arranged cannot 

 follow positive rules in all cases. In our list of instructions (too 

 long to be here quoted) we direct a classification by materials. 

 In each class we group pieces of the same general character, in 

 regard to the prevaling work to be done upon them, and in natural 

 " machine shop " order; i. e., first planing, then drilling or boring, 



