THE 



PHILOSOPHICAL MAGAZINE 

 AND JOURNAL. 



I. Description of a new Gazometer and Blow-pipe. By 

 Joseph Hume, Esq. 



A Long Acre, London, June 13, 1314. 



VERY simple apparatus to serve as a gazometer 

 and blow-pipe, and one that can be formed with ease and at 

 little expense, will probably be acceptable to the majority of 

 your readers, as well as to those experimentalists who are not 

 furnished with the usual instruments. 



As an example, and that I may more clearly describe the 

 principles and advantages of such an apparatus, I send you a 

 sketch of one constructed with vessels which I had at hand and 

 are applicable to other purposes, and which most chemists pos- 

 sess ; for, whoever wishes for a combination to produce analo- 

 gous powers, will soon perceive that this contrivance is not 

 limited to any particular size or form, but that others may be 

 adopted ; and that the flame of the lamp can be supported by 

 the operator inhaling the air into his lungs, as well as by the 

 ordinary custom of exhalation and, consequently, the application 

 of contaminated breath. 



In the present case 1 have taken a common Woulfe's receiver 

 with three necks ,; a separating funnel ; two stop-cocks, which 

 are of glass and belong to two of Nooth's machines ; and a piece 

 of glass tube properly bent and drawn out for the blow-pipe. 

 These form the whole of the plan which I now ofi^r to your 

 notice, and which are arranged agreeably to the following ex- 

 planation : 



A, (Plate I. fig. 7.) is the Woulfe's bottle with three necks, 



and filled with water ; 



B, is the separating funnel, fitted into the middle neck of the 



bottle ; 



C, a blowpipe, inserted into another neck of the same. 

 Vol. 4 4 . No. 1 95 . July 1 8 14. A D and 



