a description of extends into the base. As the angle valve is a trouble- a simple single-acting engine which could be made by groups of automobiles shown by the various exhibi- some piece of work, an ordinary stop cock is recom- any boy handy with toolsis given. It can bemade with tors, and an oval… … NN ing the valve chamber. The counter-bored portion of devoted to exhibits of automobile tires, gears, lamps, ~\ YS lubricants, and the various sundries of the automo- this hole receives the plug, f, which is bored longitud- e € fF bile trade. inally to receive the valve stem, g, of the conical…
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