1917J HORTICULTURE. 543 



duction of injurious insects and diseases and recent introductions now being 

 tested at tlie gardens. 



Development and localization of truck crops in the United States, P. J. 

 Blaik {U. S. Dept. Agr. Yearbook 1916, pp. Jt35-Ji66, figs. 13).— A statistical 

 account of the development and localization of the truck crop industry in vari- 

 ous parts of the United States. 



Home vegetable gardening, C. E. Dukst {Illinois Sta. Circ. 198 {1911), pp. 

 S-56, figs. 29). — A practical treatise on home vegetable gardening. 



How to make the garden pay, E. Mobrison and C. T. Beues {Boston: 

 Houghton Mifflin Co., 1911, pp. VII-\-176). — A small popular manual for the In- 

 tensive cultivation of home vegetable gardens. 



Vegetable culture for all, Eva {London: Herbert Jenkins, Ltd., 1911, pp. 

 XI-\-144, fiQS. 21). — A popular treatise with special reference to conditions in 

 England. 



The allotment book, W. Brett {London: C. Arthur Pearson, Ltd., 1911, pp. 

 92, figs. 21). — A popular treatise on amateur vegetable gardening, with special 

 reference to conditions In England. 



A book about potatoes and other vegetables, W. P. Wright {London: Head- 

 ley Bros., 1911, pp. IGJt, pis. 20, figs. 12). — A small practical treatise on vege- 

 table gardening, in which special consideration is given to the potato. 



Late cabbage, E. N. Reed {Neto York: John Wiley & Sons, Inc., 1911, pp. 

 XIII +131, figs. 38). — A practical treatise on cabbage culture based upon the 

 author's experience and upon the results of investigations conducted by the 

 experiment stations in the cabbage belt. 



Adult characters in sunflower seedlings, T. D. A. Cockerell {Jour. Heredity, 

 8 {1917), No. 8, pp. 361, 362, fig. l).—ln continuation of previous studies of the 

 sunflower (E. S. R., 34, p. 237), the author calls attention to a number of varia- 

 tions in sunflower seedlings. These, it is concluded, are evidently inherited 

 like other characters and may be obviously correlated with adult characters, 

 whereas the manifestation of their' effects may be limited to the seedling stage. 



The effect of continued capillai-y watering, L. Daniel {Compt. Rend. Acad. 

 Set. [Paris], 163 {1916). No. 19, pp. 525-521; abs. in Intemat. Inst. Agr. [Rome}, 

 Internat. Rev. Sci. and Pract. Agr., 8 {1911), No. 1, pp. 84, 85). — Experiments 

 conducted by the author with lettuce, chicory, cabbage, and radishes indicate 

 that the continuous capillary watering of plants is much more beneficial than 

 the usual intermittent watering employed in market gardening. Continued 

 capillary watering gave seedling plants much in advance of those given the 

 usual intermittent watering and also resulted In the development of more 

 uniform and healthy subsequent growth. 



Color as an indication of the picking maturity of fruits and vegetables, 

 L. C. Corbett {U. S. Dept. Agr. Yearbook 1916, pp. 99-106, pis. 6). — The work 

 of the Department has shown that immature apples when placed in storage 

 develop various degrees of scald, depending upon the pigmentation or color 

 development attained by the fruit up to the time of storage. As the apple 

 matures and assumes its normal pigmentation, danger from scald becomes re- 

 duced. For best storage conditions, however, the normal pigmentation should 

 not be too strongly developed, as overripe fruit suffers in storage as well as 

 green fruit. 



In the case of tomatoes, half-ripened red tomatoes will not produce a canned 

 product or a catsup of bright red color, since the pigment in such fruits is not 

 stable and fades slightly when the pulp is subjected to the temperatures re- 

 quired for sterilization or concentration. In fully ripe tomatoes the red pig- 

 ment is fixed. 



