On opium. 



397 



LETTUCE OPIUM. 



Experiment ii. 



To a folution of fulphate of Iron 

 (green vitriol) I added 20 drops of 

 the aqueous folution. A browniflj 

 coloured precipitate was formed ; but 

 not very copious. The fupematant 

 liquor upon the fubfidence of the pre- 

 cipitate was of a dirty green; as was 

 alfo the precipitate itfelf upon land- 

 ing, Tlie opium fmell was retained. 



COMMON OPIUM. 



Experiment. 12. 



The precipitate here was of a dark- 

 er colour, but in the fame propor- 

 tion apparently. The folution was 

 itfelf of a brown colour, and retained 

 the opium fmell. 



Experiment 13. 



To a folution of hepar arfenicum 

 (made with orpiment and quicklime) 

 I added 20 drops of the above aque- 

 ous folution ; a breiun and pretty co- 

 pious precipitate was here formed. 

 The fupernatant liquor appeared 

 clear. The hepatic fmell feemed to 

 be augmented by the union of die 

 two folutions. 



Experiment 14. 



The precipitate here, was of a light 

 grem colour, and very fmall in quan- 

 tity, until after (landing a confidera- 

 ble time, when die cloud began to 

 fubfide of a brownifh or dirty green 

 colour. The hepatic fmell feemed" 

 increafed. 



Experiment 15. 



To one drachm oiUme-iuaier, 1 ad- 

 ded 20 drops ; a browniOi precipitate 

 was formed. The opium fmell re- 

 mained. 



Experiment 16. 



In this experiment, a brownifli pre- 

 cipitate was likewife formed, though 

 lefs abundant ; the opium fmell re- 

 mained. 



Experiment 1 7. 



I added 20 drops, to 15 drops of 

 tutraie of/tlver, diluted with rain wa- 

 ter ; a light coloured cloud gradually 

 formed itfelf after ftandins fome time. 



'.XPERIMENT 



The fame effeft, but in a lefs de- 

 gree, took place in this experiment. 



Experiment 19. 



I added 20 drops to a folution of 

 carlomte of ammonia ; a brownifli co- 

 loured precipitate took place. The 

 peculiar fmell of both folutions, was 

 evident. 



Experiment 20. 



In this experiment the fame effecTs 

 took place. 



LETTUCE 



