USE OF GASES AGAINST HOUSEHOLD INSECTS 461 



1901. MARLATT, C. L. The insecticide value of formaldehyde 

 gas. Bull 30, n.s., Bu. Ent., U. S. Dept. Agri., p. 39. 



1902. HINDS, W. E. Carbon bisulphide as an insecticide. 

 Farmers' Bull. 145, U. S. Dept. Agri. 



1906. LAMPERT, K. Formaldehyde against insects. Zeit- 

 schrift fiir Wissenschaftliche Insektenbiologie, Vol. II, p. 12. 



1906. SLINGERLAND, M. V. Formaldehyde as an insecticide. 

 Ent. News, Vol. 17, p. 130. 



1906. MARLATT, C. L. Sulphur dioxide as a insecticide. Bull. 

 60, Bu. Ent., U. S. Dept. Agri., pp. 139-153. 



1907. HERRICK, G. W. Fumigation with hydrocyanic acid gas for 

 bedbugs. Can. Ent., Vol. 39, pp. 341-344. 



1909. SMITH, R. I. Cornweevils and other grain insects. N. C. 

 Expt. Stat. Bull., 203, pp. 25-27 (Sulphur dioxide). 



1910. HOWARD, L. O. Preventives and remedial work against 

 mosquitoes. Bu. Ent., U. S. Dept. Agri., Bull. 88, pp. 35-37 

 (Sulphur dioxid). 



1911. HARCOURT, R. Effect of mill fumigants upon flour. 36th 

 Ann. Rept. Ont. Agri. College, pp. 87-92. 



1911. CHITTENDEN, F. H. The lesser grain-borer. Bull. 96, 

 Part III, Bu. Ent., U. S. Dept. Agri., pp. 37-47. 



1911. DEAN, GEO. A. Heat as a means of controlling insects. 

 Jr. EC. Ent., Vol. 4, pp. 142-159. 



1912. FELT, E. P. Experiments with heat as an insecticide. 27th 

 Rept. State Ent., New York, p. 93. 



1912. GOODWIN, W. H. Treatment of mills with high tempera- 

 tures. Ohio Expt. Stat., Bull. 234, pp. 179-184. 



1912. HOWARD, L. O., and POPENOE, C. H. Hydrocyanic acid 

 gas against household insects. Bu. Ent., U.S. Dept. Agri., 

 Circular 163. 



1913. DEAN, GEO. A. Further data on heat as a means of 

 controlling mill insects. Jr. EC. Ent., Vol. 6, pp. 40-55. 



1913. DEAN, GEO. A. Mill and stored-grain insects. Bull. 189, 

 Kansas Expt. Stat., pp. 135-236. 



