VAN nostrand's engineering magazine. 356 orifices of about two inches iu diameter it starts into violent evaporation. This mass of nascent steam is checked by as to make up the balance of the aggre- coming in contact with the solid and un- gate area. … cular or flat, and so located as to cut This lessening of the aggregate area off about two-thirds of the usual steam ten per cent, below that of the steam port will give a very slight diminu- space. The perforations and valves vary with tion of pressure in the engine with steam boilers "of…
Engineering
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