No. 3, April, 1921] HORTICULTURE 277 



1934. Seymour, L. D. Must we revise our pruning practices? Gard. Mag. 32': 27-28. 

 4 fig. 1920. — A popular discussion of some results of pruning fruit trees based on work bj' 

 W. H. Chandler of Cornell Universitj'. — H. C. Thompson. 



1935. Shamel, a. D. Origin of a grapefruit variety having pink colored fruits. Jour. 

 Heredity 11 : 157-159. Fig. 5-8. 1920. — An account of the origin of two bud sports of grape- 

 fruit having pink colored flesh, one introduced by Reasoner Brothers of Oneco, Florida, as a 

 sport of Walters, the other as a sport of Marsh in California. — /. H. Beaumont. 



1936. Shamel, A. D. Origin of a new and improved French prune variety. Jour. Heredity 

 10: 339-343. Frontispiece, fig. 1-3. 1919.— A bud sport of the French prune (Prunus domes- 

 tica) propagated in California and bearing fruits about twice the size of those of the parent 

 variety. — /. R. Schramm. 



1937. Taylor, R. H., and E. L. Overholser. Some effects of high temperature and 

 htxmidity upon the keeping quality of Bartlett pears. Monthly Bull. California State Commis- 

 sion Hort. 8: 118-125. 1919.— When contrasted with temperatures between 70° and 85° F., 

 temperatures of 87.7 to 110° F. caused an appreciable delay in the ripening. The retardation 

 of ripening is directly proportional to temperature between the limits of 87 and 104° F. Above 

 110** F. rapid physiological breakdown results. Relative humidity does not seem to be a 

 significant factor in checking the ripening process. The flavor of pears subjected to tem- 

 peratures higher than 85° F. was not normal, being sweetish and slightly acid, juiciness was 

 lacking. The effects of high temperatures are believed to be due to the different rates of 

 enzymatic action at the different temperatures, a reduction of enzymatic action at the 

 extremely high and low temperatures retarding the ripening of the pears. — E. L. Overholser. 



1938. Tufts, W. P. Influence of heavy and light pruning upon the growth of deciduous 

 fruit trees. Monthly Bull. Dept. Agric. California 8:529-535. 1919.— Heavy cutting back 

 does not, as was originally supposed, result in renewed and vigorous root development. 

 After heavy pruning the energies of the tree are directed toward replacing the lost foliage 

 area, resulting in lessened fruit production. The author's experimental results agree with 

 those of Pickering (Woburn), and Alderman and Auchter (West Virginia), in that by light 

 pruning large and strong trees are most quickly secured, and that it is at the same time con- 

 ducive to precocious and prolific fruit production.- J5J. L. Overholser. 



1939. Tufts, W. P, Why prune bearing apricot trees heavily? Monthly Bull. California 

 State Commission Hort. 8: 15-21. 1919.— The so-called "Winters system" of apricot pruning 

 has two very serious objections: (1) The upper side of the scaffold branches is very subject 

 to sunburn; and (2) the heavy annual pruning is repressive in its effect. On the other hand, 

 in the "long-pruning" system, abundant vegetative growth is produced to shield the branches, 

 and the crop is borne both on spurs and on young shoots. To reduce wood growth and 

 increase fruitfulness in vigorously growing trees the author knows of no better method than 

 a dormant thinning-out process not accompanied by heading. — E. L. Overholser. 



1940. Whirton, T. W. A trip through the almond section of Spain. Amer. Nut Jour. 

 10: 50-51. 1919. — Spain, including her Mediterranean Islands, produces 25 per cent of the 

 world's annual output of almonds, — approximately 80,000 tons. Her mainland almonds are 

 cultivated more or less in all the territory bordering on the Mediterranean from Catalonia to 

 Andalusia and extending some distance into the interior. They are extensively cultivated 

 also on the Balearic Islands, where soil and climate are specially propitious for normal growth 

 and profitable development. — E. L. Overholser. 



1941. White, Anna. Creating a new fruit. Gard. Mag. 32^: 156-158. 3 fig. 1920.— A 

 discussion of the development of the blueberry together with brief directions for its culture. 

 — H. C. Thompson. 



1942. Whitten, J. C. Efficiency management of California orchards. Monthly Bull. 

 California State Commission Hort. 8 : 5-6. 1919. 



