MANUFACTURE OF IRON AND STEEL 189 



One grindstone, hand- or foot-power type, about 24" in 

 diameter and 3-1/2" thick. 



One bench hand emery grinder and oilstone. 



In the room should be stored: 



Wooden horses, wooden and metal blocks, skids, a block 

 and tackle, and, possibly, a chain block, crowbars, pinch bars, 

 lollers and pieces of iron pipe, rope and rope lashings with 

 ends tied or wound, and jacks of the adjustable top and simple 

 and heavy erecting types. The bench tools should consist of a 

 simple equipment, some of which can be made and others 

 purchased, such as: 



Machinist's hammers with ball, straight and cross peens, 

 each weighing from 1 to 1-3/4 pounds. 



Hand hack-saw and blades. 



Center and prick punch. 



Machinist's chisels, principally the flat or cape chisels. 



Files, handled, of the rough and middle-cut grades prin- 

 cipally, and both single- and double-cut in flat, round, 

 halt-round, square and triangular shapes. The total 

 number need not exceed 12. 



Drills in sizes ranging from 1/16" to 3/4" graded to six- 

 teenths. 



One drilling ratchet and one breast drill. 



A variety of wrenches, including a good pipe wrench, 

 monkey, alligator and a variety of single-end and solid 

 or closed wrenches such as those included in a first- 

 class automobile tool kit. A variety of socket wrenches 

 will also be found very handy. 



Two or three sizes of outside and inside calipers and 

 dividers. 



