ts of elaborate comparative tests are given, mine use, since it is not liable to injury either by dust or | thechest. showing the blower to be of u superior degree of efficiency. weather; it runs continuously without stopping to be oiled) The speed of this blower, to produce a steady current,… … vane, C, at the same time has entered the slot of cylinder, oO WE areal] living too fast. The man who is always in a G. A moment's consideration, supposing the auxiliary cylin- need not exceed 100 revolutions per minute, and it is stated ders to revolve in the direction of the arrows drawn within…
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