nd ‘Second Assistants.” Ifthere was end. In the top of it there is a plug, F, Fig. 2, which tle water ar.d some very finely powdered binoxide of but one class, and each had equal pay and an equal werks freely in its place, but is kept steam tight by barium has been introduced, a lively… … GREEN’S SLIDE VALVE. in the top of the casing, C. The set screws, H, are force. The present system compels an Examiner merely to adjust the parts as they wear. who has one or even two assistants, to go over the When the steam enters the chest through the cas- work again before a case is fimally…
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