1860 Fifty Years 1910 Arkwright Mutual Fire Insurance Company One of the As
1860 Fifty Years 1910 Arkwright Mutual Fire Insurance Company One of the As
Edward Vinton French
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195 236 ^30 '3J 230 209 143 254 165 187 .... 209 254 246 224 153 177 201 .... 224 263 239 163 188 214 .... 239 .... 1 ... . 254173 .... 200 .... 227 254 183 .... 212 . .. 241 194 204 .. I224 '276 .... 254 ••••!----|---- ■ ••■r ■■! 1 - ■, 1 TAKE NOTICE. — The above is pressure at hydrant head while stream is flowing. The corresponding Static Reservoir Pressure, or Fire-pump Pressure, must be greater than hycfrant pressure by an amount equal to friction loss between ydrant-head arid pump or reser...voir. 1>»3. 63 I 8 6o - ARKWRIGHT - 1 9 I O kinds of hose were tested in these experiments and it was found that a rough interior as in linen hose caused a loss of thirty-three pounds for every hundred feet, with the draft of an ordinary fire stream. Cotton hose, having a smooth rubber lining, caused a loss of only fourteen pounds per one hundred feet, thus being generally better for fire fighting. To get a measure of roughness, lengths were filled with plas- ter of Paris and kept under pressure until it had hardened, then the hose was cut off.
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