regard to boilers continue to Asan example of the use of this rule, suppose it is re- within the general public comprehension. It is impossible multiply, and we imagine that we have received inquiries on quired to determine the heating surface of a boiler having to publish such papers in their… … surface of the shell, increased by the sum of the interior measures below the horizon of the Pittsburgh coal. The surfaces of the flues, or 1°5708 x diameter of boiler X length section of the boiler at the furnace, showing also the furnace remarkable belt of coal seams found on the Kanawha, be- +…
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