aft. An elbow lever A device, capable of being expeditiously manipulated, pivoted on the base and a similar Jever pivoted on hollow extension, designed to receive and removably to lower persons in safety from the upper floors of high the cross arm of the drum are so arranged, in con- retain a… … short band or ring. The cylindrical portion and one ified by passing them through a solution of caustic handle of the utensil are preferably made of glass, as potash or soda of 1°35—1°40 sp. gr., or of sulphuric acooland non-absorbent material which does not re- acid of 1°53—1°56 sp. gr. In both…
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