262 



HOLMES. 



Table V. — Influence of method of precipitation. 

 MORPHINE. 



Num- 

 ber of 

 ex- 

 peri- 

 ment. 



Grams 

 alkaloid. 



Free 

 acidity, 

 grams 

 H2SO4. 



Method of precipitation. 



— iodine— 

 10 



Atoms of 

 iodine 



per mole- 

 cule Of 



alkaloid. 



Added. 



Used up. 



44 

 45 



0. 03971 

 0. 03971 



0.25 

 0.25 



Iodine added to alkaloid- 

 Alkaloid added to iodine. 



cc. 



14.96 



14.96 



cc. 

 1.65 

 1.64 



1.18 

 1.18 



CODEINE. 



46 



47 



0. 03894 

 0. 03894 



0.25 

 0.25 



Iodine added to alkaloid. 

 Alkaloid added to iodine. 



14.96 

 14.96 



4.74 

 4.72 



3.64 

 3.63 



HEROIN. 



49 



0. 05088 

 0. 05088 



0.25 

 0.25 



Iodine added to alkaloid. 

 Alkaloid added to iodine. 



14.96 

 14.96 



4.91 

 4.96 



3.56 

 3.60 



Table VI. — Influence of free acidity. 

 MORPHINE. 



Number 

 of exper- 

 iment. 



Grams of 

 alkaloid. 



Free 

 acidity, 

 grams 

 H,S04. 



N . 

 Jo 10c 



Added. 



line- 

 Used up. 



Atoms of 

 iodine 



per mole- 

 cule of 



alkaloid. 



50 

 51 

 52 

 53 



0.3971 

 0. 3971 

 0. 3971 

 0. 3971 



0.00 

 0.12 

 0.25 

 0.49 



cc. 



14.96 

 14.96 

 14.96 

 14.96 



cc. 



6.12 



1.88 



1.64 



1.20 



4.40 

 L35 

 L17 

 0.86 



CODEINE. 



54 



0. 03994 



0.00 



14.96 



5.33 



4.09 



55 



0. 03994 



0.12 



14.96 



4.81 



3.69 



56 



0.03994 



0.25 



14.96 



4.76 



3.66 



57 



0. 03994 



0.49 



14.96 



4.84 



3.72 



HEROIN. 



58 



0. 05088 



0.00 



14.96 



7.07 



5.13 



59 



0.05088 



0.12 



14.96 



5.37 



3.90 



60 



0. 05088 



0.25 



14.96 



5.07 



3.68 



61 



0. 05088 



0.49 



14.96 



5.00 



3.63 



