e fact that the very form ly increased area when opened, as these features are very meritorious, at least in a theoretical point of view. The ex- by which the greater lift was obtained made it more diffi- periments with these ordinary safety valves enabled the Com- cult for the steam to escape, and… … give the required area of opening for any particular case: the case of several experiments with the same valve, where Multiply the number of lbs. of water evaporated per hour the table shows considerable differences in the results, these by 0-005; the product will be the area of the valve in square…
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