Note 89 — COMPARATIVE EXPERIMENTS.
Reading edition
This proof is more severe in certain other experiments (not yet published) in which I had the benefit of Professor Frankland’s assistance. The vacuum in these cases was perhaps more perfect, having been procured by means of a Sprengel’s pump and a simultaneous ebullition of the fluid, during which the flasks were hermetically sealed. The closed flasks were subsequently exposed to a temperature of 293° F. for a short time.