- n 02 - 
having a spectral transmission of above 4900 Angstrom unite o^ the visible 
spectrum. Re also claims a composition of matter comprising rotenone 
the individual particles of which are coated with a dry chlorophyll- 
green film. 
As an example of the application of this invention, a liquid 
gelatin is formed by dissolving the gelatin in water. The resulting 
liquid gelatin is tnen colored with a water- soluble chlorophyll-green 
dye which may bo made of thiocarmine tlue and tartrazine yellow. "°owdered 
rotenone is then added to the chlorophyll-green- liquid gelatin. The 
amount of rotenone to he used is governed by the desired toxic strength 
of the insecticide, and sufficient water is added to bring tho suspension 
to the desired consistency fo^ snraying purposes. 
Donlan (11?), assignor to Stanco, Inc., in United States patent 
2,096,885, issued October 26, 1937, applied for October 21, 1933, claims 
an insect icidai composition comprising as an active ingredient a sub- 
stantial quantity of mineral oil of 300° to 600° F. boiling range con- 
sisting predominantly of paraffinic Lydrocarbors relegated from the 
normally accompanying nr-pnthenic hydrocarbons end added active insect i- 
cidal principles of vegetable origin, e. g. , pyrethrum, cube, tuba and 
haiari. 
Jones (222), in United States patent 2,103,135, issued December 
21, 1937, applied for July 3, 1937, dedicated to the frre use of the 
people of the United States of America claims a new chemical combination 
of rotenone and dichloroacetic acid having the empirical formula C3;sF2205« 
C^HgOsClg. He also claims a process for making r chemical compound of 
rotenone and dichloroacetic acid, which comprises essentially dissolving 
an extre„ct of plant material (e.g., Lerris, Loncho carpus, Tcphrosia; 
containing rotenone in dichloroacetic acid, adding water, and separating 
the resulting crystalline product. Reference is made to the addition 
compounds of rotenone with acetic acid, propionio acid, and alpha-chloro- 
propionic acid, in each of which the molecular ratio is t"-o mols of 
rotenone to one raol of acid. 
O'Kane (311), in United States patent 2,104,757, issued January 
11, 1938, applied for May 31, 1934, claims as an insecticidal agent a 
substantially nonaqueous combination of an oil selected from the class 
consisting of vegetable and animal oils, a contact insecticide selec- 
tively soluble in said oil, and an emulsifying agent soluble in said, 
contact agent in proportions to givn an unstable d.ispersion in water. 
Among the insect poisons, a wide variety of materials may bo 
included, and particularly exemplifying the nerve poisons or contact 
insecticides, there may be mentioned the extracts of pyrethrum flowers, 
and other oil-soluble extracts, such as those of derris root, cube root, 
or oil-soluble nerve poisons, such as the active principle of strychnia, 
as well as synthetic chemicals including various amine derivatives. 
