December, ’20] 
VICKERY: PETROLEUM INSECTICIDES 
447 
out these compounds. We are still a long way from the ideal contact 
insecticide. This should be an active insect poison and harmless to 
the most tender foliage. It should have good keeping qualities and be 
usable either as a liquid or as a dust. 
Bibliography 
Felt, E. P. 1913. Injuries Following the Application of Petroleum or Petroleum 
Products to Dormant Trees. Jour. Econ. Ent., Vol. 6, No. 2, April, 1913. 
Freeborn, S. B. and Atsatt, R. F. 1918. The Effect of Petroleum Oils on Mos¬ 
quito Larvae. Jour. Econ. Ent., Vol. 11, No. 3, June, 1918. 
Glaser, R. W. 1912. A Contribution to Our Knowledge of the Function of the 
(Enocytes of Insects. Biol. Bui., Vol. XXIII, No. 4, Sept., 1912. 
Jones, P. R. 1918. The Selection of Petroleum Insecticides from the Commercial 
Point of View. Mo. Bui. Cal. Com. Hort., Vol. 7, No. 4, April, 1918. 
Mabery, C. F. 1920. Composition of Petroleum and Its Relation to Industrial 
Use. Mining and Metallurgy, No. 158, Sec. 34, Feb., 1920. 
Moore, W. 1917. Volatility of Organic Compounds as an Index of the Toxicity 
of Their Vapors to Insects. Jour Agr. Res., Vol. X, No. 7, pp. 365. 
Moore, W. and Graham, S. A. 1918. A Study of the Toxicity of Kerosene. 
Jour. Econ. Ent., Vol. 11, No. 1, Feb., 1918. 
Moore, W. and Graham, S. A. 1918. Physical Properties Governing the Efficacy 
of Contact Insecticides. Jour. Agr. Res., Vol. XIII, No. 2. 
Moore, W. 1918. Observations on the Mode of Action of Contact Insecticides. 
Jour. Econ. Ent., Vol. 11, No. 6, Dec., 1918. 
Shafer, G. D. 1911-1915. How Contact Insecticides Kill. Tech. Bui., No. 11, 
Mich. Agr. Coll. Exp. Sta., Tech. Bui., No. 21, Mich. Agr. Coll. Exp. Sta. 
Penny, C. L. 1907. Home-made Miscible Oils. Bui. No. 79, Del. Coll. Agr. 
Exp. Sta., Aug., 1907. 
Vickery, R. K. 1917. The Selection of Petroleum Insecticides. Mo. Bui. Cal. 
Com. Hort., Vol. 6, No. 10, Oct., 1917. 
Chairman A. L. Melander: We shall now take the regular noon 
recess and adjourn to meet again at 2 o’clock p. m. 
Meeting adjourned at 12 m. 
Afternoon Session, June 17, 1920, 2 p. m. 
Chairman A. L. Melander: A very interesting communication 
to Secretary E. O. Essig, sent to me, will, I am sure, prove of interest 
to all present and will be read by the Secretary: 
Gainesville, Fla., 
Mr. A. L. Melander, May 31, 1920. 
Agricultural Experiment Station, 
Pullman, Wash. 
Dear Mr. Melander: 
I have delayed in reply to your kind favor of April 30, written at the request of 
Secretary Essig of the Pacific Slope Branch of our Association, as I had hoped that 
circumstances would so shape themselves that I might be able to attend. 
