March, 1920] GENETICS 05 



646. Love, II. II., and \V. T. Craig. Methods used and results obtained in cereal inves- 

 tigations at the Cornell Station. Jour. Amer. Soc. Agron. 10: 1 15 157. / pi., 1 fi<j. 1918. — 

 See Bot. Absts. 3, Entry 2163. 



647. Love, H. H., and W. T. Craig. Fertile wheat-rye hybrids. Jour. Heredity 10: 195- 

 207. 11 fig. May, 1919. 



648. Lundborg, H. Rasfr&gor i modern belysning. Popular handledning under midverkan 

 av fackman utgiven av. [Race questions in modern light. A popular manual issued in asso- 

 ciation with other specialists.] VI + 144 V- P- A. Norstedt & Soners: Stockholm, 1919. — 

 This work was published in connection with an exhibition of Swedish racial types and contains 

 the following treatises: 



(1) O. Almgren. On the origin of the Swedish people in light of the prehistorical 

 remains. 



(2) G. Backman. On the origin of the Swedish people and its genetical constitution 

 according to anthropology. 



(3) R. Nordenstreng. On Finlanders and Lapponians. 



(4) E. Hixlerstrom. On Walloons and their descendants in Sweden. 



(5) H. Valentin. On the Jews in Sweden. 



(6) A. Thesloff. On gypsies and "tattare." 



(7) N. v. Hofsten. On heredity in the light of modern science. 



(8) H. Lundborg. On eugenical ideas and essays of our time. 



(9) H. Lundborg. On the mixing of races and marriages between relatives from a bio- 

 logical view. — K. V. Ossian Dahlgren. 



649. Macoun, W. T. Apple breeding in Canada. Agric. Gaz. Canada 5: 126-128. 1918. 

 — Summarizes apple breeding in Canada, most of which has been carried on since 1890. At 

 the Central Experimental Farm 115 new varieties have been named. A number of seeds were 

 planted in 1898 which were saved in an orchard containing 400 to 500 named varieties. Seeds 

 were saved from those varieties which were most promising. Of 1211 seedlings, which have 

 borne fruit, 378 are worthy of further trial. Some crosses made by Dr. Win. Saunders proved 

 more hardy than any other varieties of apples or crabs yet tested. Some of the hardier of 

 these have been recrossed with named varieties of apples with the hope of obtaining hardier 

 varieties with larger fruit. Seed was sown in 1910 from hardiest Russian apples and 75,000 

 seedlings are being tested for hardiness at the Dominion Experimental Farms in the prairie 

 provinces. — Conclusions regarding method of origination of new varieties are given. Two 

 methods are favored: (1) Sow seeds of varieties which most nearly approach the desired char- 

 acters. Save seeds, if possible, from an orchard containing several varieties, which have the 

 desired characters, as natural crossing will give many combinations. (2) Crossing of known 

 varieties which most nearly approach the desired characters. The Siberian crab apple (Pyrus 

 baccata) crossed with the apple should give hardier apple varieties. — H. K. Hayes. 



650. Maiocco, F. L. Le leggi di Mendel e l'eredita. [Mendel's law of heredity.] 222 

 p. Fratelli Bocca: Torino, 191S — See Bot. Absts. 3, Entry 626. 



651. Meyer, A. W. The occurrence of superfoetation. Jour. Amer. Med. Assoc. 72:769- 

 774. 1919— See Bot. Absts. 3, Entry 1497. 



652. Moore, Carl R. On the physiological properties of the gonads as controllers of 

 somatic and psychical characteristics. II. Growth of gouadectomized male and female rats. 

 Jour. Exp. Zool. 28: 459-467. 1 fig. July 5, 1919.— See Bot. Absts. 3, Entry 1499. 



653. Morgan, T. H., and Calvin B. Bridges. The inheritance of a fluctuating charac- 

 ter. Jour. Gen. Physiol. 1: 639-643. 2 fig. July 20, 1919— See Bot, Absts. 3, Entry 1016. 



