140 EXPEEIMENT STATION KECOED. 



concentration of the young leaves near the growing point of peach and apple 

 twigs is not so great as that of the old leaves. The molecular concentration of 

 the leaves of fruit trees is generally considerably greater than that of fruit 

 except in the case of some ripe fruits like cherries or currants. Where this 

 difference prevails the leaves are able to remove water from the fruit. There 

 seem to be times in the orchard when the air is very dry and the moisture 

 supply limited when a large foliage may remove the water from the fruit to an 

 Injurious extent." 



Hotbeds and cold frames, R. A. McGinty (Colorado Sta. Bui. 199 (1914), 

 pp. 35-JfO). — This paper contains popular instructions for the care and manage- 

 ment of hotbeds and cold frames. 



Vegetable growing' in Colorado, R. A. McGinty [Colorado Sta. Bid. 199 

 (1914), PP- 3-34). — This paper contains popular directions for the culture of 

 different vegetables under Colorado conditions. 



Mendelism in melons, D. Lumsden (Neiv Hampshire Sta. Bui. 112 (1914), 

 pp. 3-58, figs. 20). — The author here reports a study of a portion of the progeny 

 of two distinct types of melons with reference to their inheritance of such char- 

 acters as form and size of fruit, color of skin, size of seed, ribbing, and netting. 

 The English muskmelon, Sutton Superlative, was used as the female parent 

 and the French cantaloup, Delices de la Table, as the male parent. In certain 

 cases crossing was continued through the fifth generation. 



Summarizing the work as a whole, the author concludes that the pairs of char- 

 acters here considered show a blend in the Fi generation rather than a domi- 

 nance of one of the characters as determined in Mendel's work with peas [E. S. 

 R., 13, p. 744]. The segregation of dominant and recessive characters occurs in 

 the Fa generation. The six pairs of characters studied show dominance and 

 recessiveness as follows: Dominant — yellow color of skin, round form of fruit, 

 large size of seeds, ribbing, netting, and large size of fruits. Recessive — green 

 color of skin, obtuse-elliptical form of fruit, small size of seeds, nonribbiug, 

 smoothness, and small size of fruits. Seeds of one hybrid having a green skin 

 and of another having a yellow skin were selected for the purpose of ascertain- 

 ing whether a pure hybrid type had been fixed. The test as continued for two 

 generations proved fixation of type. 



Experiments in onion culture, J. W. Lloyd (Illinois Sta. Bui. 175 (1914), 

 pp. 337-362, figs. 2; Ais., pp. 4, fios- 2). — This bulletin reports experiments in 

 onion culture which have been conducted at the station for a period of six years. 



A test of the effect of using wood ashes in addition to manure as a fertilizer 

 for onions shows that the yield was increased five years out of the six by the 

 use of the ashes. The net value of the increase was sufficient to make their use 

 profitable in only three of the years, but there was an average net profit due to 

 the use of ashes of $17.46 per acre annually for the six-year period. 



In order to test the relative value of early and late planting, four plantings at 

 intervals of 14 days, beginning the latter part of March, were made during the 

 first four years and three plantings in the last two years. The results show, in 

 general, that the period of growth decreased as the date of planting was de- 

 ferred. Likewise, the shortening of the growth period by late planting had a 

 decidedly unfavorable influence on profitable yield. The average size of the 

 bulbs decreased as the planting became later. However, in addition to the time 

 of planting, the size and yield of onions were also influenced by prevailing 

 weather conditions, there being more differences in the size of onions from the 

 same plat in different seasons than from different plats in the same season. 



In order to secure data regarding the influence of thinning on the size and 

 yield of bulbs and the relative cost of growing onions with and without thinning, 



