Researches chemical and philosophical: chiefly concerning nitrous oxide or dephlogisticated nitrous air and its respiration / By Humphry Davy.

  • Davy, Humphry, Sir, 1778-1829.
Date:
1800
Catalogue details

Licence: Public Domain Mark

Credit: Researches chemical and philosophical: chiefly concerning nitrous oxide or dephlogisticated nitrous air and its respiration / By Humphry Davy. Source: Wellcome Collection.

    602/614 (page 576)
    To prevent an abforption of mercury in cafe of a condenfation taking place in the retort made nfe of for generating air, Mr. Davy has applied the,flop-cock to which the neck is firmly luted. This flop-cock is likewife of great fervice in faturating water with acid or alkaline gafes, which may be effetfled by luting one end of the tube k to the flop-cock, and plung- ing the other into the fluid in the fmall vcflel /, cemented at top, and terminating in the bent funnel m—the tube h having been previoufly , removed, and the lower orifice of the tube D either funk to a confiderable depth in mercury, , or clofed with a ground flopper. The bend of the funnel w, may be accurately clofed by the introduction of a few lines of mercury. The application of the flop-cock n, has enabled Mr. Davy to perform fome experiments on refpiration with confiderable accuracy. Note. This apparatus was firft deferibed in the third part of Dr. Beddoes*s Conliderations j its relation to Mr. Davy’s experiments with the improvements it has lately received, may probably be deemed fufficient to excufe the re-printing it.—^I'he weight I, Fig. 2, having been omitted in the plate, the reader must fupply the deficiency, w. c.