60 BULLETIN 1199, U. S. DEPARTMENT OF AGRICULTURE. 
231. Improving egg production by breeding. By Raymond Pearl. Sept., 1914. A popular s umm ary 
of 205. 
232. Histological basis of different shank colors in the domestic fowl. By H. R. Barrows. Sept.,1914. 
233. Maine aphids of the rose family. By Edith M. Patch. Nov., 1914. 
234. [Abstracts of papers published by the station in 1915 but not included in the bulletins]; finances; 
meteorology: index. Dec, 1914. 
235. Studies on oat breeding: II, Selection within pure fines. By F. M. Surface and Raymond Pearl. 
Jan., 1915. 
236. Field experiments in 1914. By C. D. Woods [and others]. Feb., 1915. 
237. The assumption of male secondary characters by a cow with cystic degeneration of the ovaries. By 
Raymond Pearl and F. M. Surface. Mar., 1915. 
238. Leafhoppers of Maine. By Herbert Osborn. Apr., 1915. 
239. Studies on bean breeding: I, Standard types of yellow eye beans. By Raymond Pearl and F. M. 
Surface. May, 1915. 
240. Apple spraying experiments in 1914. By W. J. Morse and Michael Shapovalov. May, 1915. 
241. Woolly aphid of elm and juneberry (Schizoneura americana in pari,, of authors). By Edith M. 
Patch. Aug., 1915. 
242. Pink and green aphid of potato (Macrosiphum solanifolii Ashmead). By Edith M. Patch. Oct., 
1915. 
243. Further data on the measurement of inbreeding. By Raymond Pearl. Nov., 1915. 
244. Blueberry insects in Maine. By W. C. Woods. Dec, 1915. 
245. Abstracts of papers not included in bulletins: finances; meterology; index. Dec, 1915. 
246. Field experiments in 1915. Reported by C. D. Woods. Jan., 1916. 
247. Report of the first Jersey sires' futurity test of the Aroostook Jersey Breeders' Association. By Ray- 
mond Pearl. Feb., 1916. 
248. Studies of life histories of leafhoppers of Maine. By Herbert Osborn. Mar., 1916. 
249. Six years of experimental apple spraying at Highmoor farm. By W. J. Morse. Mar., 1916. 
250. Studies on oat breeding: IV, Pure line varieties. By F. M. Surface and Jacob Zinn. May, 1916. 
251. Soluble poisonsin the poisoned bait spray to control the adult of the apple maggot (Rliagoletis pomonella 
Walsh). By H. H. P. Severin. Apr., 1916. 
252. Spraying experiments and apple diseases in 1915. By W. J. Morse. May, 1916. 
253. Syrphidae of Maine. By C. L. Metcalf. July, 1916. 
254. Studies oflife histories of froghoppers of Maine. By Herbert Osborn. Sept., 1916. 
255. Dwarf eggs of the domestic fowl. By Raymond Pearl and M. R. Curtis. Oct., 1916. 
256. Elm leaf rosette and woolly aphid of the apple, Schizoneura lanigera (americana in part). By Edith 
M. Patch. Nov., 1916. 
257. Abstracts of papers not included in bulletins: finances; meteorology; index. Dec, 1916. 
258. Some commonly neglected factors underlying the stock breeding industry. By Raymond Pearl. 
Jan., 1917. 
259. Punae of some Maine species of Notodontoidea. By Edna Mosher. Feb., 1917. 
260. Barn and field experiments in 1916. Reported by C. D. Woods. Mar., 1917. 
261. Report of progress on animal husbandry investigations in 1916. By Raymond Pearl. June, 1917. 
262. The change of milk flow with age, as determined from seven day records of Jersey cows. By Raymond 
Pearl and S. W. Patterson. July, 1917. 
263. Syrphidae of Maine, second report: Life history studies. By C. L. Metcalf. Aug., 1917. 
264. Life history, habits, natural enemies and methods of control of the currant fruit fly ( Epochra canadensis 
Loew). By H. H. P. Severin. Sept., 1917. 
265. The biology of the alder flea beetle (Altica bimarginata Say). By W. C. Woods. Oct., 1917. 
266. The chemical composition of green sprouted oats; fish wastes for feeding animals. By J. M. Bartlett. 
Nov., 1917. 
267. The aphid of choke cherry and grain (Aphis pseudoavenae sp. n.). By Edith M. Patch. Nov., 1917. 
268. Abstracts of papers not included in bulletins; finances; meteorology ; index. Dec, 1917. 
269. Barn and field experiments in 1917. Reported by C. D. Woods. Feb., 1918. 
270. Eastern aphids: A few species of Prociphilus; food plant catalogue of the Aphidae of the world, V. 
By Edith M. Patch. Apr., 1918. 
271. Apple spraying experiments in 1916 and 1917. By W. J. Morse. May, 1918. 
272. Inheritance studies of certain color and horn characteristics in first generation crosses of dairy and 
beef breeds. By J. W. Gowen. Aug., 1918. 
273. The biology of Maine species of Altica. By W.C.Woods. Oct., 1918. 
274. Results of progress on animal husbandry investigations in 1917. By J. W. Gowen. Dec, 1918. 
275. Abstracts of papers not included in bulletins; finances; meteorology; index. Dec, 1918. 
276. The meadow" plant bug [ Miris dolabratus). By Herbert Osborn. Mar., 1919. 
277. Potato studies. By C.D.Woods. Feb., 1919. 
278. Soil test experiment at Aroostook farm. Second report. By C. D. Woods. Mar., 1919. 
279. The variation of Ayrshire cows in the quantity and fat content of their milk. By Raymond Pearl and 
J. R. Minor. Apr., 1919. 
280. Appliances andmethods for pedigree poultry breeding at the Maine station. By J. W. Gowen. June 
1919. Largely a reprint and compilation of 159-165. 
281. Studies in milk secretion: VII, Transmitting qualities of Jersey sires for milk yield, butter-fat per- 
centage, and butter-fat. By Raymond Pearl, J. W. Gowen, and J. R. Rice. Oct., 1919. 
282. Three pink and green aphids of the rose; food plant catalog of the Aphididae of the world, VI. By 
Edith M. Patch. Dec, 1919. 
283. Report of progress on animal husbandry investigations in 1919. ByJ.W. Gowen. Dec, 1919. 
284. Abstract of papers notincludedin bulletins; finances; meteorology ; index. Dec, 1919. 
285. Wheat investigations: I, Purelines. By Jacob Zinn. Mar., 1920. 
286. The variation ofmilk secretion with age in Jersey cattle. By J. W. Gowen. May, 1920. 
287. Self sterility and cross sterility in the apple. By J. W. Gowen. May, 1920. 
288. Some observations upon the effect of borax in fertilizers. By W. J. Morse. June, 1920. 
289. The correlation between milk yield of one lactation and that of succeeding lactations. By J. W. Gowen. 
June, 1920. 
290. The variation of butter-fat percentage with agein Jersey cattle. By J. W. Gowen. Aug., 1920. 
291. The correlation between the butter-fat percentage of one lactation and the butter-fat percentage of 
succeeding lactations in Jersey cattle. By J. W. Gowen. Aug., 1920. 
292. Potato mosaic By Donald Folsom. Aug., 1920. 
293. Studiesin milk secretion: VIII, On theinfluence of age on the milk yield and butter-fat percentage, as 
determined from the 365 day records of Holstein-Friesian cattle. By J. W. Gowen. Oct., 1920. 
294. Normal and abnormal germination of grass fruits. By Jacob Zinn. Dec, 1920. 
295. Abstracts of papers not included in bulletins; finances; meteorology; index. Dec, 1920. 
