of a block, B (Fig. 1, Nos. vation, while also rendering access practicable to such face, is shown in the accompanying illustration, and 1and 2), which is screwed to the extremity, A, of the muz- has been patented by William E. Harris, of No. 207° zle, which has been previously threaded to this… … same role. force it instantly to closed position as soon as its nor- When the inventor submitted his imal support, the glass, is removed, and thus prevent HARRIS’ THAWING APPARATUS. idea to the ministers of war and the escape of steam or hot water from the boiler, the navy, it was not thought that…
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