-156- 
Oil of cedar sprinkled between the sheets gives a degree of 
protection to people compelled to sleep in flea-infested places.— 
Bishopp, ( 58 , p. 30), 
Spray solutions containing oil of cedar wood were tested e gainst 
the bean aphid. The minumum concentration required to kill about 95 
percent of the aphids was 1 em. in 100 cc. of liquid while that for 
nicotine sulfate was 0.009 gin. — Richardson and Smith (322). 
There was no emergence of screwworm flies from meat treated with 
oil of cedar leaf.— Parman and coworkers ( 302 ) . 
The use of cedar wood and oil of cedar is referred to in four pa- 
tents for mothproofing (U. S. 1,610,167; 1,620,587; 1,630,836; and 
Ger. 470,458). — Roark ( 533 , pp. 36-37; 335 , p. 23). 
PICEA ABIES (L.) Karst. Norway spruce, 
Extraots of the leaves and small branohes killed none of the mos- 
quito larvae tested,— Hartz ell and Wilcoxon ( 188) • 
PICEA ORIENTALIS (L.) Link. Oriental spruce. 
Extracts were not repellent to the Japanese beetle.— Metzger and 
Grant (277). 
PINUS LONGI FOLIA Roxb. Pine. 
In India the crude oleoresin was useful in the preparation of 
plasters, ointments, and pastilles for fumigations. Turpentine oil 
was used as a remedy for mange in horses.— Watt ( 422 , v. 6, pt. 1,. 
p. 245). 
Extracts of pine applied as sprays against adult mosquitoes were 
much inferior to the standard mosquitocide. — Wats and Sinp-h ( 421 ) • 
PINUS RIGIDA Mill. Pitch pine. 
Extracts were not repellent to the Japanese beetle.— Metzger and 
Grant (277). 
PINUS spp. Pines. 
The references included under this heading pertain mostly to 
various pine products, including pine oil or pine-tar oil, turpentine 
and its constituents, rosin or resin and resin acid, creosote of wood 
tar, and pine extracts. The exaot species of pines are unknown to the 
writer and only a few of the numerous papers will be cited. 
