Langenhan—The Arsenical Solutions. 
153 
Pharmacopoeial. Text. In as much as Fowler’s solution was 
made official in the first edition of the U. S. Pharmacopoeia, was 
included in both the New York and Philadelphia editions of 1830, 
and has remained official up to the present time, there are eleven 
written texts to be considered. Moreover, the 1820 edition and 
both of the 1830 editions contain the text in both Latin and Eng¬ 
lish. The detailed comments on the text, whether based on the 
study of the literature of the subject or on laboratory experiments 
or observations, are recorded in connection with those parts of the 
text to which they have reference. A better idea of this part may 
be had by a mere glance at the list of text subjects commented 
upon: 
1. ) Titles and Synonyms. 
2. ) Definition. 
3. ) Preservation. 
4. ) Arsenic trioxide as an ingredient. 
5. ) The form in which it is used. 
6. ) Potassium carbonate or bicarbonate as an ingredient. 
7. ) Ratio of ingredients. 
8. ) Water. 
9. ) Amount of water to effect solution. 
10. ) Solution of arsenic trioxide. 
11. ) Alcohol and compound tincture of lavender. 
12. ) Volume of finished product. 
13. ) Appearance of finished product. 
14. ) Qualitative tests. 
15. ) Assay. 
16. ) Dose. 
Note. For convenient reference, the numbers representing the sub¬ 
jects commented upon are incorporated in the text proper. 
