HORTICULTURE. 539 



condition of the trees. The introduction of a nutrient solution into the root 

 appears to have a temporary value in re-establishing growth conditions in 

 newly transplanted trees. 



[Peach culture] (Ontario Dept. Agr. Bui. 201, 1912, pp. 59, figs. 24).— This 

 is a two-part bulletin dealing with the culture and diseases of the peach. 



I. Peach growing, by F. M. Clement (pp. 1-31). — This discusses the methods 

 of growing peaches as based on experience and ob.servation in the Niagara 

 Peninsula, as well as on the results of exi)erimental worli in different parts of 

 the United States. 



II. Peach diseases, by L. Caesar (pp. 33-59). — This describes the most imiwr- 

 tant peach diseases of Ontario, together with methods for their control. 



Artificial date ripening, A. E. Vinson and W. H. Ross {Arizotiu Sta. Rpt. 

 1911, pp. 563-505). — Date ripening investigations (E. S. R., 25, p. 745) were 

 continued in 1911. The season was exceptionally unfavorable to natural ripen- 

 ing of dates and demonstrates the desirability for ripening all classes of dates 

 artificially. Tests made during the year indicate that evenness of maturity is 

 one of the most important factors in successful date culture in most parts of 

 southern Arizona. Varieties that mature evenly can be artificially ripened 

 without loss into high quality fruit in the most adverse seasons, whereas 

 varieties that mature less evenly, such as Rhars, will yield at any given time 

 only a small percentage of first quality fruit when artificially ripened. 



Two lots of Rhars dates ripened by nitrous ether vapor produced 55 and 59 

 per cent, respectively, of first quality fruit. An attempt to ripen artificially 

 sound Deglet Noor dates by heat yielded only an inconsiderable amount of 

 usable but inferior fruit. 



Notes are given on promising varieties of dates for southern Arizona. 



Marketing problems, A. W. Morrill {Arizona Sta. Rpt. 1911, pp. 554, 555). — 

 A brief discussion of suggested improvements in the marketing of the Arizona 

 navel orange crop. 



The reduction of waste in marketing, F. Andrews {U. S. Dept. Agr. Ycar- 

 book 1911, pp. 165-176). — In this article the author describes the working of 2 

 genernl plans which have been extensively used during the past 10 or 15 year.? to 

 reduce the cost of marketing fresh fruits and vegetables. One plan is used by 

 shippers to distribute consignments among cities and towns in such a manner 

 as to avoid a glut; the other is employed by transportation companies in mov- 

 ing perishable freight quickly, and in rerouting it even when it is on the way 

 to market. 



The Weather Bureau and the cranberry industry, H. J. Cox ( U. S. Dept. 

 Agr. Yearbook 1911, pp 211-222, pis. .J). — In addition to a general account of the 

 cranberry industry in the United States, investigations into frost and tempera- 

 ture conditions in Wisconsin cranberry marshes are described. It is stated 

 that the investigations, which were conducted with the view of facilitating the 

 forecasting of frost, have proved of great advantage to the growers. 



Vines and vine culture, A. F. Barron (London, 1912, 5. ed., rev. and enl., pp. 

 XVI-\-211, figs. 95). — ^A treatise on amateur and commercial grape growing in 

 the conservatory and vineyard, including also chapters dealing with selection 

 of grapes for special purposes, the classification of grapes, and varieties of 

 European and American grapes. 



The Oppenheim method of tying up vine shoots, F. Koeer (Allg. Wein 

 Ztg., 25 (1910), No. 16, pp. 159-161; 26 (1911), No. 16, pp. 163, 164; 21 (1912), 

 No. //, pp. 3/f, 35; abs. in Internat. Inst. Agr. [Ro7ne], Bnl. Bur. Agr. Intel, and 

 Plant Diseases, 3 (1912), No. 3, pp. 695-699, figs. 2). — ^A system of training up 

 grape vines between parallel movable sets of wires is here described and illus- 

 65584°— No. 6—12 4 



