Also, when a battery of quantity is employed, the mer- cessity—discovered by experiment—of baluncing the are many circumstances, such as large shops, counting cury is greatly heated and vaporized ; and it is said that weight of the beveled washers upon opposite sides of rooms, &c., in which these… … tractions of the metal re- liquid is obtained by dis- UPHAM’S IMPROVED STEAM TRAP. sulting from changes of tem- solving 3 parts of perchloride of iron, or hydrated per- perature, a stationary valve apparatus there are two reservoirs of mercury, one above rr A rr stem working through the free end of…
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