20 BUL. 1199 (SUP. 2), U. S. DEPARTMENT OF AGRICULTURE 
511. Composition and prices of commercial fertilizers in New York in 1923. L. L. 
Van Slyke. Feb., 1924. 
512. Control of the cabbage maggot in the seedbed. Hugh Glasgow. Feb., 1924. 
513. Cabbage seedbed diseases and Delphinium root rots, their relation to certain 
methods of cabbage-maggot control. W. O. Gloyer and Hugh Glasgow. 
Feb., 1924. 
514. New or noteworthy fruits, VII. U. P. Hedrick. Feb., 1924. 
515. Composition of official samples of feeding-stuffs and mixtures collected in New York 
from January to July, 1923. L. L. Van Slyke. Feb., 1924. 
*516. Twenty-five years of fertilizers in a New York apple orchard. U. P. Hedrick and 
H. B. Tukey. Feb., 1924. 
517. Comparative efficiency of dust and spray mixtures in controlling the currant 
aphis. P. J. Parrott and S. W. Harman. July, 1924. 
*518. Experiments with potatoes : I, Dusting vs. spraying. F. C. Stewart and P. J. 
Parrott. — II, Row competition and border effect. F. C. Stewart. July, 
1924. 
519. Dusting and spraying to control grape root-worm. F. Z. Hartzell. July, 1924. 
520. The grafting of American grapes. F. E. Gladwin. July, 1924. 
521. Chemical studies of the combined lead arsenate and lime-sulfur spray. R. W. 
Thatcher and L. R. Streeter. Aug., 1924. 
*522. Control of leafroll and mosaic in potatoes by isolating and roguing the seed plat. 
F. C. Stewart. Aug., 1924. 
523. Fumigation with hydrogen cyanide for control of pear psylla. R. L. Webster. 
Nov., 1924. 
524. Milking machines : VIII, The sanitary efficiency of a simplified type of milk- 
ing machine. F. L. Mickle. Nov., 1924. 
525. Changes in the composition and cost of fertilizers in New York from 1914 to 1924. 
L. L. Van Slyke. Dec, 1924. 
•526. Variations in varieties of canning peas. F. H. Hall. Dec, 1924. 
TECHNICAL BULLETINS 
92. Studies with corn pollen : I, Analysis and composition of corn pollen. R. J. 
Anderson and W. L. Kulp. — II, Concerning certain lipoids, a hydrocarbon, 
and phytosterol occurring in the pollen of white flint corn. R. J. Anderson. 
Feb., 1923. 
93. Methods of Gram, staining. G. J. Hucker and H. J. Conn. Mar., 1923. 
94. A statistical study of some field plat yields : I, Tobacco investigations at Bald- 
winsville in cooperation with the Bureau of plant industry, United States 
department of agriculture : II, the clover vs. timothy rotation experiment 
on the station farm at Geneva ; III, fertilizer plat experiments on the sta- 
tion farm at Geneva. R. C. Collison and J. D. Harlan. July, 1923. 
95. Studies with phytosterols : Phytosterols of corn oil, cottonseed oil, and linseed 
oil. R. J. Anderson and M. G. Moore. Aug., 1923. 
96. Chemical studies of grape pigments : The anthocyans in Norton and Concord grapes. 
R. J. Anderson. Aug., 1923. 
97. Factors influencing the activity of spore-forming bacteria in soil. J. S. Joffe 
and H. J. Conn. Oct., 1923. 
98. The relation between the clumps of bacteria found in market milk and the flora 
of dairy utensils. W. A. Whiting. Nov., 1923. 
99. Studies on the Coccaceae : I, Previous taxonomic studies concerning the genera 
of the Coccaceae. G. J. Hucker. June, 1924. 
100. Studies on the Coccaceae : II, A study of the general characters of the Micro- 
cocci. G. J. Hucker, June, 1924. 
101. Studies on the Coccaceae : III, The nitrogen metabolism of the Micrococci. G. J. 
Hucker. June, 1924. 
102. Studies on the Coccaceae : IV, The classification of genus Micrococcus Conn. 
G. J. Hucker. June, 1924. 
103. Studies on the Coccaceae : V, Serological studies of the Micrococci. G. J. Hucker. 
June, 1924. 
104. Filtration and clarification of milk. A. C. Dahlberg and J. C. Marquardt. July, 
1924. 
105. The bacterial flora of milking machines. A. H. Robertson. July, 1924. 
♦Bulletins marked with an asterisk (*) were issued in popular form with the same 
or modified titles. 
