in the Pyrites, l6r 



A like contrivance we find in Lemery's cours de 

 Cbymie, and which Homberg, but with no fmall 

 degree of improvement, in regard to the bignefs 

 of the glafs, ( the former employing only a glafs 

 funnel) may have probably borrowed from him. 



c This procefs, 'tis true, coincides with the ufual 

 j method by the belly but much altered and im- 

 c proved, as by the former there is much more pro- 

 c cured than by the latter method, which is princi- 



* pally owing to two improvements ; the firfr, in 

 c the large receiver employed inflead of the glafs 

 f garden bell, which in circumference is much too 

 ' wide, and in internal capacity much too fmall 

 1 and narrow, that but a little can fettle thereon, 

 ' when much muft evaporate, and be quite loft \ 

 c whereas the fitted receiver has a fmall aperture, 



* and internally a large width, whereby the large 

 ' evaporation is obviated, and a more abundant 

 c collection promoted. The other improvement 



* regards the quantity of the fulphur, there being 



* formerly too little fulphur put in at once, and 



* that often fcarce melted, confequently, the acid 

 4 not fo capable of afcending, especially in fuch 

 c quantity as one would willingly have it ; which 



* is fo true, that when the pot holds not more 

 ' than io or 12 lb. when not always full, and 

 4 when the fulphur is not thoroughly melted quite 



M * down 



is compleat, filtre the lixivium, and evaporate to a dry powder, 

 as in the rirfl procefs; pat this powder into a tubulated retort, 

 and pear en, by degrees, a pound and half of rectified oil of vt- 

 Ifiol; proceed to diftfll, as before; and thus you will obtain 

 about eight ounces of a more ftrong, and more volatile acid fpiri: 

 fan the former ; of a yeliowiih colour. — Our author owns it was 

 Dr. StahTa method that gave him the hint of doing the teroe 

 in a bef.er manner. 



