1814.] Chemical Proportions. 17 



Number of Weight of an 



atoms. integrant particle. 



275 Perchloride of tin 4 ch + 1 t 32-697 * 



•276 Chloride of lead 2 ch + 1 I 34-970 * 



277 Chloride of zinc 1 ch + 1 z 8-G37 a 



27S Chloride of bismuth 1 ch + 1 b 13-493 b 



279 Chloride of antimony 2 ch + I a 20-107 c 



280 Chloride of arsenic 2 ch + 1 a 14-996 d 



281 Chloride of manganese 2 ch + 1 m . . . .16-126 c 



282 Chloride of carbonic oxide ... 1 ch + cox.... 6-249 f 



> Perchloride of tin {fuming liquor of Lilavius), according to 

 this statement, is a compound of 100 chlorine + 81 '73 tin. Now 

 Mr. John Davy's analysis gives 100 chlorine + 82-089 tin. 



z This is obtained by fusing muriate of lead. According to the 

 statement in the table, it ought to be a compound of 100 chlorine 

 4- 288*725 lead. Now Mr. John Davy obtained by analysis 100 

 chlorine + 287*9 lead. 



a This is obtained by fusing dry muriate of zinc. According to 

 the statement in the table, it ought to be a compound of 100 

 chlorine + 92-019 zinc. Mr. John Davy's analysis gives 100 

 chlorine 4- 100 zinc. This does not correspond quite so well as 

 most of the other analyses of that gentleman u ith the theoretic 

 result. 



b It is obtained by distilling a mixture of bismuth and corrosive 

 sublimate. According to the statement in the table, it is composed 

 of 100 chlorine 4- 19998 bismuth. Mr. John Davy obtained by 

 analysis 100 chlorine 4- 197*57 bismuth. 



c This is the butter of antimony. If it be composed as stated in 

 the table, it consists of 100 chlorine 4- 123-51 antimony. Mr. 

 John Davy's analysis gives 100 chlorine + 152*65 antimony. 

 Probably my number for the weight of an atom of antimony is 

 inaccurate. 



d This is the butter of arsenic, formed by distilling a mixture of 

 corrosive sublimate and arsenic, or by burning arsenic in chlorine 

 gas. According to the statement in the table, it is a compound of 

 100 chlorine + 66*669 arsenic. Mr. John Davy's analysis makes 

 it a compound of 100 chlorine 4- 56 - 88 arsenic; but he makes 

 the weight of 4 cubic inches of chlorine gas 306 grains, whereas 

 they weigh only 3-03 grains. The correction of tills error makes 

 hit result 100 chlorine 4- 66-05 arsenic, which almost agrees with 

 the tabular statement. 



' This is obtained by fusing the white muriate of manganese. 

 According to the statement in the table, it is a compound of 100 

 chlorine 4- 79*26 manganese. Mr. John Davy's analysis gives us 

 100 chlorine 4- 65*185 manganese; but I consider it as in some 

 respects objectionable. 



1 This is the phosgene gas of Mr. John Davy. According to the 



Vol, IV. N°J. 15 



