58 Kansas Academy of Science. 



Menstruum. Extractive Gm. 

 (Parts of U. S. P. alcohol per 100 cc, 



Preparation. to parts of water or expressed as 



other solvents.) percentage. 



Apocyanum, U. S. P 3 to 2 29-32 



Arnica flowers, N. F Dil. ale 15-17 



Arnica root 3 to 1 10-12 



Asclepias Dil. ale 11-13 



Blue cohosh 2 to 1 24-26 



Bryonia U. S. P. ale 5-6 



Columba, U. S. P 7 to 3 6-8 



Cimicifuga, U. S. P U. S. P. ale 9-11 



Echinacea About 5 to 1 10-13 



Eucalyptus, U. S. P 3 to 1 23-26 



Gentian, U. S. P Dil. ale 26-31 



Geranium, U. S. P 3 to 2 26-29 



Grindelia, U. S. P 3 to 1 13-16 



Phytolacca root, U. S. P Dil. ale 18-21 



Quassia, U. S. P 1 to 2 5 



Quillaja, U. S. P Dil. ale 21-26 



Rhubarb, U. S. P 4 to 1 26 



Rhus glabra, U. S. P Dil. ale 21-25 



Senega, U. S. P About 2 to 1 26-29 



Senna, U. S. P Dil. ale 17-21 



Taraxacum, U. S. P Dil. ale 21-26 



Uva ursi, U. S. P 2 to about 6h 56-61 



Viburnum opulus, U. S. P 3 to 1 ". 16-19 



Viburnum prunifolium, U. S. P 2 to 1 11-13 



Xanthoxylum bark, U. S. P 3 to 1 11-21 



and a variation from these has been made apparently neces- 

 sary. In the Twenty-second Annual Report of Connecticut 

 Agricultural Experiment Station, 1898, a most excellent paper 

 is published, where 125 samples were collected and examined. 

 Numerous other valuable articles have appeared and are fre- 

 quently consulted. 



Since the food and drug law has come into operation it is 

 absolutely necessary that a rapid preliminary method be had 

 for quickly determining whether a quantitative estimation is 

 necessary, and for this purpose we have found good results 

 in the ether and alcoholic extractives. 



Two gms. of the powdered material were extracted with ab- 

 solute ether, the ethereal tinctures evaporated at ordinary 

 temperature, and finally dried over sulfuric acid. The total 

 ether extract is weighed. The extract is then heated to about 

 110 degrees to constant weight, this latter weight being the 

 non-volatile extract, and the difference between this and the 

 first weight representing the volatile constituents. 



We have been endeavoring to obtain through the use of 

 other extractive solvents, such as petroleum ether, acetone, 

 methyl alcohol, carbon tetrachlorid and chloroform, a series 

 of results. The work has not progressed sufficiently to re- 



