th St., Philadel- . plates and bolts are placed in position and the nuts connected together by a screw-threaded bar carrying a phia, Pa. .urned down upon the slotted plate, A, until the parts clamping wheel, which may be readily turned for clamping the plates to the window sill. A block is used in… … greater part intermixed with the ice, giving it the appear-! of the bar, A, until they touch the sides »r corners of the anoe of thin scales with dendritic markings. to be attached to a sloping window sill, so as to elevate the nuts, then the blocks, B, are secured in position by bending In an…
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