JOURNAL 



O F 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



THE ARTS. 



APRIL 1801. 



ARTICLE I. 



Sottie Obfsrvathns on different Hydrocarbonatet and Combinations of Carbone luith Oxygen, i2fc. 

 in reply tofome of Dr. PrieJiUy's late ObjeSlions to the New Syftem of Chemiflry. By W. 

 Cru icks ha nk, Woolwich. 



o. 



'N perufing Dr. Prieftley's late publication, in which he fupports the doftrine of 

 phlogifton, I was much ftruck with fome of the experiments there related, more efpe- 

 ciaHy with the quantity and nature of the gafes obtained from the grey oxide of iron and 

 charcoal, and the fame oxide with the carbonate of barytcs. 



Although I had not the leaft doubt of the accuracy of thefc experiments, yet I was de- 

 termined to repeat, and extend them, and to pay particular attention to the nature of the 

 different gafes obtained. 



Accordingly a quantity of the grey oxide, or fcales of iron feparated in forging, were 

 introduced into a crucible, and expofed to a red heat for upwards of half an hour } at the 

 fame time a quantity of powdered charcoal was introduced into another crucible, which 

 had a cover luted on, and likewife expofed to a ftrong red heat ; thefe were mixed while 

 hot, and introduced into a fmall coated glafs retort. The retort was then placed in a 

 furnace, its neck being plunged under water, in a pneumato-chemical tub, and heat gra- 

 dually applied. 



Vol. V.—April x8oi. B By 



