Page:Philosophical Transactions of the Royal Society A - Volume 184.djvu/107

108 In the following table some of these results are shown :—

TABLE VII.—Pressure Experiments. Ho + N30. Pressure. 500 mm. 760 mm. 1000 mm. Mean rate 2094 2307 2302 on,. + 0, Pressure. 500 mm. 760 mm. 1000 mm. Mean rate 2280 2322 2319 CH4 + o8. Pressure. 500 mm. 760 mm. 1000 mm. Mean rate 2418 2470 2488 C2N3 + 03 (in .5 mm. tube). Pressure. 500 mm. 760 mm. 1000 mm. Mean rate 2536 2677 2671

has published 110 experiments on the influence of initial temperature on the explosion-wave; but, if the wave is propagated in a manner analogous to a sound wave, it might be anticipated that an increase in the initial temperature of the gases would increase the velocity. The reverse effect is found in the explosion of hydrogen and oxygen. Experiments made at 10° C. and 100° C. showed a small, but distinct, lowering of the rate at the higher temperature. The experiments were made alternately at the high and low temperature, in order to eliminate the effect which might be produced by any mistake in the mixture or error in the chronograph. The comparative experiments made at 10° agreed with those previously obtained