Mr. B. C. Brodie on Myricine. 251 



The silver salt was made as in the other cases by precipi- 

 tation from the ammoniacal solution of the acid. 



I. 0'6885 grm. of this salt gave .... 0*2005 silver. 

 II. 0*66025 grm. of the same gave . . . 0*1920 silver. 



III. 0*623 grm. of another preparation gave 0*182 silver. 



IV. 0*609 grm. of the same gave . . . 0*17625 silver. 

 V. 0*671 grm. of another preparation gave 0*197 silver. 



VI. 0*744' grm. of the same gave . . . 0*2185 silver, 

 giving in 100 parts — 



I. II. III. IV. V. VI. 



29*12 29*23 29*21 28*94 29*35 29*36 



CO2. HO. 

 I. 0*4458 grm. of the first preparation gave 0*869 0*3495 

 II, 0*4463 grm. of the same preparation gave 0*870 0*3555 

 III. 0*5896 grm. of thesecondpreparation gave 0*7545 0*3065 

 which correspond in 100 parts to — 



I. 11. III. 



Carbon 53*16 53*22 52*82 



Hydrogen .... 8*70 8*85 8*75 



Silver and oxygen . . 38*14 37*93 38*43 



100*00 100*00 100*00 

 The silver salt is by no means insoluble in the ammoniacal 

 solution, so that in the making of the salt by this method a 

 certain separation of the substance is effected. If any impu- 

 rity were presented, it probably would be detected on analysing 

 the acid as again separated from the silver salt. 



CO2. HO. 

 I. 0*2523grm. of the acid thus separated gave 0*6970 0*285 

 11.0*228 grm. of the same gave . . . . 0*6255 0*257 

 giving in 100 parts — 



Carbon . . . .75*88 74*82 



Hydrogen . . 12*56 12*52 



Oxygen . . . 12*06 12*66 



100*00 100-00 



These analyses, as well as those of the acid previous to 

 combination with silver, agree with the formula of palmitic 

 acid, C32 H32 O4, with which substance the melting-point of 

 the acid also identifies it. The calculated numbers in parts 

 per cent, of the acid and silver salt are — 



C32 . . 192 75-0 



H32 . . 32 12*5 



O4 . . 32 12*5 



256 1000 



