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 fur 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. 



