t of the expansion and contraction of the spiral spring, G, and the needle, H. At Hisalsoa ends ofthe sheets permit considerable expansion and sheets by the changes of temperature. Ifa roof is plug, or guide, screwed to the inside of the chamber, covered in the spring, the heats of summer will ex-… … roof is at all times assured. is thus opened and the cartridge can be intro- An application fora patent is now pending, and duced. forfurther information address Ed. Becker, 347 Cen- 'Yhe chamber is then moved forward anc locked restore the former smoothness. Continual, or, at tral avenue,…
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