Geocentric Places of Vesta and Ceres. 



197 



exactly one and a half of such water of ammonia. 100 grains of 

 this water contain 147'2 cubic inches of gas. Hence one grain 

 of water holds condensed in such aqueous ammonia^ two cubic 

 inches of the gas ; or one volume of distilled water is united to 

 505 volumes of gas. 



It is a remarkable coincidence, that one volume of water when 

 converted into aqueous muriatic acid, specific gravity 1*200; or 

 into aqueous ammonia, specific gravity 0.900, expands in either 

 case into a volume and a half. 



If from 998 we deduct the specific gravity of water of am- 

 monia, expressed in three integers, the remainder, divided by 4, 

 will give for a quotient the quantity of alkali contained in all such 

 liquid ammonia as is used in medicine, or in chemical researches, 

 viz. between specific gravities 0*936 and 0*980. 



XXXI. Right Ascension, Declination, and Passage of the Me- 

 ridian of Ceres ; and true apparent Right Ascension of Dr» 

 MaskelYxNe's 36 Stars for every Day in the Year 1821. 

 By the Rev. J. Grooby. 



[Continued from p. 133.] 



Right Ascension, l^c. of Ceres. 



Talk 



