LITERATURE CITED 
(1) Blakeslee, E. B. 
1919. USE OF TOXIC GASES AS A POSSIBLE MEANS OF CONTROL OF THE 
peach-tree borer. U. S. Dept. Agr. Bui. 796, 23 pp., illus. 
(2) Bqlley, H. L. 
1900. investigations on weeds. N. Dak. Agr. Exp. Sta. Rpt. 1889, 
pp. 25-28. 
(3) Brown, B. E. 
1922. EFFECT OF BORAX IN FERTILIZER ON THE GROWTH AND YIELD OF 
potatoes. U. S. Dept. Agr. Bui. 998, 8 pp., illus. 
(4) DUSSERRE, C. 
1899. DESTRUCTION DES MAUVAISES HERBES PAR LES SUBSTANCES CHI- 
miques. Chron. Agr. Canton Vaud, ann. 12, pp. 265-268. 
(5) Guyton, T. L., and Stear, J. R. 
1924. PDB (PARADICHLOROBENZENE) AND OTHER CONTROLS FOR THE PEACH- 
TREE borer. Pa. Dept. Agr. Gen. Bui. 383, 10 pp., illus. 
(6) Hinds, W. E. 
1917. carbon disulphid as an insecticide. U. S. Dept. Agr. Farmers' 
Bui. 799, 21 pp. 
(7) Jones, L. R., and Orton, W. A. 
1897. ORANGE HAWKWEED OR " PAINT-BRUSH." Vt. Agr. Exp. Sta. Bill. 
56, 16 pp. 
(8) 1899. killing weeds with chemicals. Vt. Agr. Exp. Sta. Rpt. 
1898-99, pp. 182-188. 
(9) LlND, J. 
1915. berberisbusken og berberisloven. Tidsskr. Planteavl., Bd. 
22, pp. 729-780. 
(10) Potts, H. W. 
1902. a brier and blackberry bush eradicator. Jour. Dept. Agr. 
Victoria, vol. 1, p. 27. 
(11) Rudolfs, W. 
1920. experiments on the value of common rock salt and sulphur 
for killing live stumps. Soil Sci., vol. 9, pp. 181-189, illus. 
(12) RUMBOLD, C. 
1920. the injection of chemicals into chestnut trees. Amer. Jour. 
Bot, vol. 7, pp. 1-20, illus. 
(13) 1920. EFFECT ON CHESTNUTS OF SUBSTANCES INJECTED INTO THEIR 
trunks. Amer. Jour. Bot., vol. 7, pp. 45-56, illus. 
(14) Schulz, E. R., and Thompson, N. F. 
1925. SOME EFFECTS OF SODIUM ARSENITE WHEN USED TO KILL THE 
common barberry. U. S. Dept. Agr. Bui. 1316, 19 pp., illus. 
(15) Thompson, N. F. 
1923. kill the common barberry with chemicals. U. S. Dept. Agr. 
Circ. 268, 4 pp., illus. 
(16) 1924. chemical eradication of the common barberry. U. S. Dept. 
Agr. Circ. 332, 4 pp. 
(17) Valder, G. 
1902. the eradication of prickly pears. Agr. Gaz. N. S. Wales, 
vol. 13, pp. 59-62, illus. 
(18) Wilcox, E. V. 
1909. carbon bisulphid for killing weeds. Hawaii Agr. Exp. Sta. 
Press Bui. 25, 4 pp. 
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