Gaivanic Society, aSl 



cubic inches of Sir G. S. Evelyn's ftandard at 60°, and 

 15445-7 -^ 6 -02896 is equal to 253-088 ; the weight in troy 

 grains of fuch a cubic inch of water at its maximum of den- 

 fity and in vacuo, according to the exptrimentsof the French 

 commilTioners. 



*'Now, according to Mr. Gilpin's Tables (Phil. Tranf. for 

 1794, p. 382), the fpeclfic gravity of water in this Rate is to 

 that which it pofleflesat 60" as 1000-94 to 1000. But 100094 

 : 1000 : : 253-08S : 252-851. The weight of a cubic inch of 

 water, therefore, according to this method of calculation, 

 would, if weighed in vacuo at 6o"-, be — 252-85 grains; an4 

 if weighed in air at the fame temperature, under the preffiire 

 of 29' inches, = 25255; being within yo'-o?^^^ part of the 

 weight deduced from Sir G. S. Evelyn's experiments. 



" It was thought indifpenfable thus to (late the hypothefes 

 on which the authors have proceeded with refpecl to their 

 calculations, and confequently with regard to the inftruments 

 which they have hitherto manufactured for afccrtaining the 

 relative ftrengths and values of liquors of various defcriptions, 

 and particularly thofe which conftitute the fubjeft of thefe 

 fhects. The variation of denfity in alcoholic compounds is 

 a circumftance which is not only of importance to the mer- 

 chant, the fpirit dealer, and the revenue officer; to the phi- 

 lofopher, who is engaged in the inveftigation of the nature 

 and progreffion of thofe forces by which the conftituent par- 

 ticles of matter are connected with each other, it muit alfo 

 afford matter of interefling contemplation. It is, therefore, 

 of no-inconfiderable confcfjuence that every thing relating to 

 it (liould be ellablitlied on the bed authorities aud the fureft 

 foundations, and that the public tliould be enabled to judge 

 of the degree of credit which is to be given to thofe v\ ho en- 

 deavour to elucidate fo important a fubje£l." 



L. Proceedings of Learned Societies. 

 GALVANIC SOCIEXy, PARIS. 



I TITS fociety has organized a commiflion of experiments. 

 Thoiiret is cleAcd prcfidenl; Aboville, vicc-prefident ; and 

 I/arn, fecrttary. 



M. VViiickler gave an cxtraft of fcveral obfervations on 

 cafes of dcafnefs cured by M. Schanli, of C'aflil. 



The fenator Alirial communicated a mcnif)ir of M. Pfing- 



ftcn, diredor of the inllilulion for deaf and dumb at Kiel, 



6 tending 



