PENNSYLVANIA PORTO RICO. 145 
141. Cultural methods in bearing orchards. By J. P. Stewart. June, 1916. 
142. Net energy values for ruminants. By H. P. Armsby and J. A. Fries.— Net energy values of American 
feeding stuffs. By H. P. Armsby and F. S. Putney. July, 1918. 
143. Computation of dairy rations. By F. S. Putney and H. P. Armsby. Aug., 1916. Based on 114 and 
142. See 161. 
144. The maintenance of breeding ewes of mutton and wool sheep. By B. O. Severson. Oct., 1916. 
145. Steer feeding experiments. By W. H. Tomhave, B. O. Severson, and Paul Gerlaugh. Apr., 1917. 
146. Thirty-five years' results with fertilizers. By F. D. Gardner, C. F. Noll, and P. S. Baker. May, 1917. 
147. Miscellaneous experiments, from the director's report, 1916-17. July, 1917. 
148. Wheat. By C. F. NoU. Aug., 1917. 
149. The relative value of limestone of different degrees of fineness for soil improvement. By J. W. White. 
Oct., 1917. See 152. 
150. Raising beef cattle. By B. O. Severson. Jan., 1818. 
151. Fertilizer experiments on DeKalb soils: A preliminary report. By J. W. White. Feb., 1918. 
152. The relative value of limestone of different degrees of fineness for soil improvement. By J. W. White 
and F. D. Gardner. Mar., 1918. A popular edition of 149. 
153. The fertilization of apple orchards. By J. P. Stewart. May, 1918. 
154. A variety test of cabbage. By C. E. Myers and J. S. Gardner. Jan., 1919. 
155. Fertilizer exoeriments on DeKalb soil: Yields of clover, corn, and Kentucky blue grass. By J. W. 
White. 'Feb., 1919. 
156. The potato wart disease: A new and serious disease recently discovered in Pennsylvania. By C. R. 
Orton and F. D. Kern. Mar., 1919. 
157. Cost of burning lime in the stack or heap. By William Frear and C. L. Goodling.— Supplementary 
report upon the limestone resources of Pennsylvania. By William Frear and C. A. Kern. Apr., 
1919. 
158. An economic study of the gas tractor in Pennsylvania. By D. S. Fox. May, 1919. 
159. Dairy farming in southeastern Pennsylvania. By G. A. Billings. Sept., 1919. 
160. Rusts on conifers in Pennsylvania. By J. F. Adams.— Sexual fusions and development of the sexual 
organs in the Peridermiums. By J. F. Adams. Dec, 1919. 
161. Computation of dairy rations. [Revised by A. A. Borland from Bui. 143 by F. S. Putney and A. P. 
Armsby.] Mar., 1920. 
162. The control of frog eye on apple. By R. C. Walton. May, 1920. 
163. Cross breeding Delaine merino ewes with pure-bred mutton rams. By W. H. Tomhave and C. W. 
McDonald. May, 1920. 
164. Lime requirement of Pennsylvania soils. (Summary of a lime requirement survey of Pennsylvania.) 
By J. W. White. July, 1920. 
BULLETINS OF INFORMATION. 
1. The computation of rations for farm animals. By H. P. Armsby. Second edition, Dec, 1896. 
2. Composition of full cream cheese. By William Frear. Sept., 1897. 
3. Spray calendar. By G. C. Butz. Apr., 1902. 
PORTO RICO. 
Porto Rico Agricultural Experiment Station, Mayaguez. 
BULLETINS. 
1. The agricultural experiment station of Porto Rico, its establishment, location, and purpose. By 
F. D. Gardner. Sept., 1902. Also Spanish edition. 
2. The changa, or mole cricket (Scapteriscus didadylus Latr.) in Porto Rico. By O. W. Barrett. Sept., 
1902. Also Spanish edition. 
3. Soil survey from Arecibo to Ponce, Porto Rico. By C. W. Dorsey, L. Mesmer, and T. A. Caine. 
Sept. ; 1903. Also Spanish edition. 
4. Propagation and marketing of oranges in Porto Rico. By H. C. Henricksen. May, 1904. Also 
Spanish edition. 
5. Tobacco investigations in Porto Rico during 1903-4. By J. Van Leenhoff, jr. Dec, 1904. Also 
Spanish edition. 
6. The yautias, or taniers of Porto Rico. By O. W. Barrett. Apr., 1905. Also Spanish edition. 
7. Vegetable growing in Porto Rico. By H. C. Henricksen. Feb., 1906. Also Spanish edition. 
8. Pine-apple growing in Porto Rico. By H. C. Henricksen and M. J. Iorns. Jan., 1909. (Issued 
Apr., 1909.) Also Spanish edition. 
9. Sugar cane in Porto Rico. By D. W. May. Apr., 1910. Also Spanish edition. 
10. Insects injurious to citrus fruits and methods for combating them. By W. V. Tower. Jan., 1911. 
Also Spanish edition. 
11. Relation of calcareous soils to pineapple chlorosis. By P. L. Gile. May, 1911. Also Spanish edition. 
12. Lime-magnesia ratio as influenced by concentration. By P. L. Gile. Sept., 1912. 
13. Studies on acid soils of Porto Rico. By Oscar Loew. Oct., 1913. 
14. The red clay soil of Porto Rico. By P. L. Gile and C. N. Ageton. Mar., 1914. 
15. Porto Rican beekeeping. By E. F. Phillips. May, 1914. Also Spanish edition. 
16. The effect of strongly calcareous soils on the growth and ash composition of certain plants. By 
P. L. Gile and C. N. Ageton. Sept., 1914. 
17. Fungus diseases of coffee in Porto Rico. By G. L. Fawcett. Feb., 1915. Also Spanish edition. 
18. Citrus fertilization experiments in Porto Rico. By C. F. Kinman. May, 1915. Also Spanish 
edition. 
19. Cover crops for Porto Rico. By C. F. Kinman. Jan., 1916. Also Spanish edition. 
20. Experiments on the supposed deterioration of varieties of vegetables in Porto Rico, with suggestions 
for seed preservation. By C. F. Kinman and T. B. McClelland. Nov., 1916. Also Spanish 
edition. 
21. Some profitable and unprofitable coffee lands. By T. B. McClelland. Mar., 1917. Also Spanish 
edition. 
22. Effect of different methods of transplanting coffee. By T. B. McClelland. June, 1917. Also Spanish 
edition. 
23. The changa or West Indian mole cricket. By R. H. Van Zwaluwenburg. Feb., 1918. 
24. The mango in Porto Rico. By C. F. Kinman. Feb., 1918. 
25. The bat guanos of Porto Rico and their fertilizing value. By P. L. Gile and J. O. Carrero. July, 
1918. 
26. Vanilla: A promising new crop for Porto Rico. By T. B. McClelland. Apr., 1919. 
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