128 



PROPOSED SYSTEM. 



When there is a series of operations of the same kind performed 

 on one object, like the five draws in cartridge-making or the eleven 

 millings of the breech block, the exact stage of work may be 

 indicated by a suffix as follows: Third draw, 350, 3 ; or 350, c; 

 or 350, third ; and the eleventh milling as 650, 1 1 ; or 650, k; or 

 650, eleventh, as may be directed. This course admits of variations 

 in each set of operations within a group without interfering with 

 the sequence of the other sets. 



NOTE. Operations upon tools, etc., required to produce staple objects of manu- 

 facture, are to be indicated according to the operation for which the tool is made, and 

 not according to the operation which happens to be necessary to make the tool suitable 

 for its work. For example, tempering a die for swaging bullets would be referred to 

 swaging bullets instead of tempering, because it is more important to know all the 

 items of cost for swaging bullets than it is to know the cost of tempering dies. The 

 tempering may, however, be also indicated in the separate space left for detailed state- 

 ment. But operations for other than staple objects may be indicated by the sym- 

 bol for the mechanical operation actually performed ; thus, tempering cold chisels 

 would be, say, 213, T., HI. This course will prevent the use of vaguely synonymous 

 terms describing occupation, and will afford exact ground for analysis without regard 

 to the particular shop or department in which the work happens to be done. 



ANALYSIS OF OPERATIONS. 



CLASS i. 

 Symbols of Operations causing Changes in Condition. 



Heating 101 



Drying 102 



Annealing 103 



Tempering Hi 



Case-hardening 112 



Pickling 121 



Cleaning 122 



Washing 123 



Blacking in oil 131 



Browning 132 



Plating 133 



Polishing 134 



Burnishing 135 



Oiling 141 



Puttying or filling 142 



Painting 143 



Varnishing 144 



Whitewashing 145 



Stamping 15* 



Printing 152 



Stencilling 153 



Etching 154 



Moving by hand 191 



" " team 192 



Changes of Situation. 



Moving by power. 



193 



