e economical use of such fuel. is combined with sulphur and a metallic oxyde, improved alarm water gauge for steam boilers. then [the mass subjected to heat until it be- The nature of the invention consists in attach- VARIABLE GAUGE WHEELS FOR RAILROAD CARS. comes somewhat hard, when it is forced… … looped fabrics to contain air. Two surfaces now in common use for cotton gins have The annexed engravings represent an im- means of carriers, R ; in fig. 2 such carriers are of such fabrics are coated with India rubber ce- the'spaces between the teeth made with acute provement on Wheels for…
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