LIEP.ARY 
p; , :>:t BOARD 
AvTil 1942 S-553 
A PJSVISW OF METHODS lOR TH3 
CH3lv:i GAL ANALYSIS OF ROTSWOIIS-BSARING PJ^ANTS 
ijy Howard A. Jones, Division of Insecticide Investigations 
CONTSilTS 
Page 
Introduction -------------------------- 3 
Snjnpling ---------------------------- 2 
Moisture ---------------------------- 5 
Total extract ------------------------- 7 
P-otenone ---------------------------- 14 
Deg^jc^lin and rctenone plus deguelin -------------- 48 
Toxicarol and other alkali-solucle s^^tstances --------- 59 
^'iscellan'^ous color in a trie determinations ----------- 61 
Other determinations ----------------------- 56 
Literature cited ---- -------_---___--_-- 71 
