642 EXPERIMENT STATION EECOED. 



processes; storage; cost and profit of tea production; and conditions in the 

 experimental tea gardens at Sumnierville. 



The experience with tea culture at Sumnierville indicates that the quantity 

 of tea produced varies and is influenced by the seed, soil, climate, cultivation, 

 pruning, plucking, and many other causes. A large production seems to be made 

 always at the expense of the quality of the product. It is believed that this 

 experiment "has gone far to demonstrate the practicability of growing tea 

 commercially in suitable parts of this country." 



Coconut cultivation in the West Indies (Imp. Dcpt. Agr. West Indies 

 Pamphlet 70, 1911, pp. /F+46, figs. 19). — This pamphlet, which was prepared 

 by F. W. South and H. A. Ballon, discusses the establishment and maintenance 

 of a plantation, and gives an account of the i>ests and diseases of the coconut 

 palm as at present known in the West Indies, together with a short outline of 

 the preparation and use of various commercial products obtained from this palm. 



Cocoa production and trade (Spec. Cons. Rpts [U. S.] 1912, No: 50, pp. 51). — 

 This comprises a statistical review of cocoa production and trade in the various 

 producing and consuming countries. A project for the valorization of cocoa 

 is also outlined. 



FORESTRY. 



Tolerance of eucalyptus for alkali, R. H. Loughridge (California Hta. Bui. 

 225, pp. 2-'i7-317, figs. 17). — The first part of this bulletin comprises the results 

 of experiments conducted to ascertain as near as possible the alkali tolerance 

 of the principal eucalypts. The results are based chiefly on a study of seed- 

 lings planted at the Tulare Substation. The conditions under which the experi- 

 ments were conducted are described and the behavior of the different species 

 under alkali conditions, both at the substation and on other plantations, is 

 reported in tabular form and discussed. The remainder of the bulletin, which 

 deals with cultural methods as well as descriptions and uses of various eucalypts, 

 is largely reprinted from a previous bulletin (E. S. R., 20, p. 542). 



A general review of the work thus far done shows that the limit of tolerance 

 of alkali salts by eucalypts, as well as in other cultures, increases with care 

 in cultivation and irrigation of the young trees. Alkali tolerance, especially of 

 carbonate of soda, may be increased if the alkali be kept below the roots or 

 at a depth of several feet until the roots have passed beyond the alkali bed, 

 both downward and laterally and the bark of the roots has become sufficiently 

 thick to resist corrosion. Carbonate of soda proved to be the chief hurtful 

 ingredient. The sulphates and chlorids even in large amounts did little injury, 

 except when a thick crust was formed on the surface of the ground. A per- 

 centage of carbonate of soda of over 0.07 for many of the species and 0.09 for 

 E. rudi-s and rostrata seems to have a retarding effect on the growth. In gen- 

 eral a percentage of 0.04 of carbonate of soda in 3 ft. of depth (or about 5,000 

 lbs. per acre) was usually tolerated without injury by each of the species tested. 



British trees, including' the finer shrubs for garden and woodland, C. A. 

 Johns, edited by E. T. Cook (London and New York, [1911], rev. ed., pp. 

 XVI+285, pis. 56, fls. 41). — This is a revised edition of the late author's 

 Forest Trees of Britain. It is essentially a handbook of popular information 

 relative to the distinguishing characteristics, adaptation, and planting value 

 of the principal trees and shrubs grown in England. 



Seeds and seedlings of native and commonly cultivated trees and shrubs 

 in France. — I, Conifers, R. Hickel (Grames et Plantules des Arl)res et Arbustes 

 Indigenes et CommuiK'inent Caltives en Franee. Versailles, 1911, pp. 179, figs. 

 93). — In this work the author aims to present sketches and detailed descrip- 

 tions of seeds and seedlings of French trees and shrubs, based upon personally 



