])|2 COMBINATIONS OF OXIMURIATIC GAS AVD OXIGEIT. 



discovered many years ago, and have always practised witli 

 success : if to 4 pnrts of scraped cheese be added one part of 

 calcined oyster shells, or other pure calcareous earth, and 

 this composition be pressed strongly into the pores of the 

 wood, the sap will instantly cease to flow ; the largest branch 

 may of course betaken off at any season with safety. 



Oft some of the Comhinations of Oximuriatie Gasand-Oxigen, 

 and on the Chemical Relations of these Principles to Jtv- 

 flammable Bodies. By Humphrey Davy, Esq. LL. />. 

 See.R. S. Prof. Chem. R. I. F. R. S. E* 



1. Introduction^ 



^ . . . ^N the last communication which I had the honour of pre- 

 Oximunatic . ,T»ir^" > i • #.« 



acidgasasim- sentmg to the Koyal bociety, I stated a number of facts, 



pie substance, vvhich inclined me to believe, that the body improperly 

 called in the modern nomenclature of chemistry oximuri- 

 atie acid gas has not as yet been decomposed; but that it is 

 a peculiar substance, elementary as far as our knowledge 

 extends, and analogous in many of its properties to oxigen 

 gas. 



My objects in the present lecture are to detail a number 

 of experiments, which 1 have made for the purpose of illus* 

 trating more fully the nature, properties, and combinations 

 of this substance, and its attractions for inflamtnable bo- 

 dies, as compared with those of oxigen; and hk-ewise to 

 present some general views and conclasions concerning 

 the chemical powers of different species of matter, and the 

 proportions in which they enter into union. 



I have been almost constantly employed, since the last ses- 

 sion of the society, upon these regearclus, yet this time has 

 not beeo sufficient to enable me to approach to any thing 

 complete in the investigation. But on subjects, important 



• Phil. Trans, for 1811,^. 1 



both 



