HORTICULTURE. 841 



number of bogs indicates that witliin certain limits failure to fruit is a varietal 

 cliaracteristic. It is concluded tliat it pays to Iveep hive bees in cranberry bogs 

 during the blossoming season in years when wild bees are not plentiful. Breed- 

 ing work is being conducted to secure a more prolific variety of cranberry than 

 is at present known. 



General observations are also made relative to indirect water injury, the 

 setting of the blossoms, and the failure of fruit to mature from apparently nor- 

 mal pollinated young berries. It was observed that contrary to the general 

 impression many top blossoms matured fruit. 



Cranberry bog construction for Wisconsin, O. G. Malde {Wisconsin Sta. 

 Bui. 213, pp. 3-24, fios. 20).— The author outlines the chief requirements for 

 success in cranberry culture and describes in detail the methods of constructing 

 and planting a cranberry bog. The subject of cranberry bog management in 

 Wisconsin is to be treated in a later bulletin. 



A study of the arsenic content of grapes and wine, Mathieu {Ann. Falsif., 

 5 {1912). No. .',0. pp. 7S-S0). — Analyses were made of grapes and wine from 

 vines treated with arsenical sprays and from untreated vines. 



Traces of arsenic were found in the grapes and wine from the untreated vines. 

 Although slightly higher amounts were found in the treated products, the analy- 

 ses in which the maximum quantity was found showed an arsenic content of 

 only 0.05 nig. per kilogram of fresh grapes, or 0.05 gm. per liter of wine. 

 Arsenical treatment during a season when the conditions are favorable for the 

 distribution of the arsenic appears to increase slightly the arsenic content of the 

 products. 



The avocado in Florida, its propagation, cultivation, and marketing, P. H. 

 Rolfs {Fla. arowcr, 5 {1911), No. 5, p. 3).— A brief popular account in which, 

 in addition to the phases mentioned in the title, the author points out that the 

 avocado has some severe diseases. One of the most common is due to a prob- 

 ably undescribed species of Gloeosporium, which attacks the leaves and also the 

 fruit in various stages of development. 



Spraying with Bordeaux on the first appearance of the trouble appears to 

 control it without much difficulty. 



The mango, P. J. Wester {PhiUppine Bur. Agr. Farmers^ Bui. 18, 1911, pp. 

 60, j}ls. 9). — A treatise on the mango with special reference to its culture in 

 the Philippines. 



General consideration is given to the nomenclature, origin, geographical dis- 

 tribution, bibliography, and botany of the mango. The Philippine and fiberless 

 Indian varieties are described and the methods of propagation and cultivation 

 are discussed in detail. Other phases discussed include the comix)sition and 

 uses of the fruit, other uses of the mango, marketing, the embryony of the 

 mango, breeding, diseases, insects affecting the mango, insect control, spraying, 

 and fumigation, with formulas for fungicides and insecticides. 



The embryony of the mango, P. J. AVesteb {Philippine Agr. Rev. [English 

 Ed.], 5 {1912), No. 2, pp. 80-82, pi. i).— The author points out the relation 

 between the monoembryonic character of the seed of many cultivated mangoes 

 and the failure of these varieties to reproduce the type. 



Irises, W. R, Dykes {London and Edinburgh, [1912], pp. XIII+llO, pis. 8).— 

 In this work the author gives a short account of the structure of the iris plant 

 and of the groups into which the genus may be conveniently divided, describes 

 the leading characteristics and requirements of the several cultivated si^ecies, 

 and gives suggestions including cultural information relative to the utilization 

 of irises in the rock garden and in the herbaceous border. 



An iris calendar .showing the planting season and. time of flowering of differ- 

 ent species is also given. 



