Royal Society of Lo7uh7t. ijij 



longer two but one, and oxvs;enoiis gas and hydrogenous wiil 

 become aqueous vapour : this, therefore, would not be a cafe 

 ot two gdjes held together by affinity. 2. Two gafes mar 

 feparaleiy retain their caloric, and Itill be held by cheniicn! 

 atHnity ; that i~, there may be an •equilihrtum between the 

 powcft of attraction and repulfion : but this is. evidentlv in- 

 confirtent with the third law of condcni'atioh and rarefaction, 

 obferveJ in Inch compounds. 

 Mmcliefler, .J. DaLTON. 



Nov. 2 0. 



K<A€. I have lately read a paper to the Literary and Philo- 

 fophical Society of Manche'ter, iu which I have (liown that 

 the quantity of carbonic acid gas found in a given volume of 

 atmofpheric air is not more than -roVo'^'' part of the whole; 

 and that the faid gas is held in water, not by chemical affi- 

 nity, but merely by the preffiu'c of the gas, abflractedly con- 

 fidcrcd, on the furface, forcing it into the pores of the water. 



XXVIII. Proceedings of Learned Societies. 

 ROVAL SOCIETY OF LONDON. 



i HIS learned body has recommenced its labours by be- 

 ftowing on count Runiford the firfl medal awarded from the 

 fund provided by the count hinifclf for difccveries on the 

 nature and projjcrties of heat. 



The Copley medal has been adjudged to Dr. Woolafton. 



On the firlt night of meeting, wliich was on the nth of 

 November, the Hakerian lecture was delivered bv Dr. Wool- 

 alton. The fubjeit, horizontal refraction. 



On the ]bth was read a paper, by iMr. Chenevix, on the 

 shemical properties of the humours of tiic eye ; and one by 

 IVlr. Smilhfou on calamines or ores of zinc. 



On the 2_5ih. a paper, by M. Aldiiii, on the galvo-eleiStri- 

 city of hot-blooded as well as cold-blooded animals. The 

 experiments diitailed in this curious paper arc (imilar to thofe 

 ut which we gave an account in our lail, and to fome delailcd 

 in a fubfequcnt |)age of our prefeni number. 



FRENCH NATIONAL INSTITUTE.. 



Account of the labours of the Clals of tlic Mnlhenialical 

 and IMiyfical Sciences during the lalt quarter of the vear lo. 

 -.-The malhematlcal part by Lacr(>ix fccrelary. 



A STB (9- 



