ry large in propor- are cooling coils connected by a coupling to suitable tion to the size of the heaters, which are rated at 1H. P. metals, and till a comparatively recent time was known nipples extending out from a heading, which is divided per sq. ft. of heating surface, so that it heats the… … sawdust or other non-conductor of heat. The sec- is in the latter form that it occurs in Otago. The WOOD'S REFRIGERATOR FOR WATER MAINS. tional construction permits the ready removal of metal itself is of a white color, extremely brittle, |and heavy, the specific gravity being 19°1, that of gold…
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