928 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Water, Storage of, on Cache La Poudre and Big Thompson 

 Rivers. By C. E. Tait (U.S.A. Dep. Agr. Office Exp. Stn., Bull. 134 ; 

 11)03). — This bulletin shows the value of private enterprise in providing 

 water storage to irrigate growing crops in the dry and arid portions of 

 Northern Colorado. The method of construction of reservoirs and the 

 operations attendant upon same in relation to supply are ably set forth 

 and illustrated by numerous plates and figures. — E. F. H. 



Water, The Relation of, to Yield. By J. Warren Smith (U.S.A. 

 Dep. Agr. Year Book, 1903, p. 215 ; charts). — The writer of this article 

 believes that few people have any proper appreciation of the effect of an 

 abundant water supply upon the ultimate yield of crops. It is self- 

 evident that, to have water furnished to the plant in any soil in sufficient 

 quantities, there must be an abundant supply, available either through 

 actual rainfall or through irrigation. A series of valuable charts is 

 given, showing at a glance the precipitations during various months, also 

 the yield of corn, and the price. A description and a discussion accom- 

 pany each chart. — V. J. M. 



Wattle, The Australian. By David G. Fairchild (U.S.A. Dep. 

 Agr. Bur. PI. Ind., Bull, 51, pt. 4, 1904; illustrated).— The bark of the 

 Australian Wattle (Acacia mollissima Willd.) has long been used for 

 tanning purposes. It is not as good as Oak, but tans more quickly, and 

 is in request for the commoner grades of leather. The supply formerly 

 came from Australia, but latterly Natal has produced a large quantity of 

 the bark, and the object of the pamphlet is to encourage the industry in 

 the Hawaiian Islands, where it is already promising, the United States 

 proper being hardly free enough from frost for the successful cultivation of 

 the Wattle. The trees are stripped when from seven to ten years of age, 

 and the timber is used in the mines. 



The industry pays well in Natal, and does not require much labour, 

 sixty men being sufficient for an estate of 2,400 acres. 



Some good illustrations from photographs are appended. — C. H. C. 



Wheat, Durum, The Commercial Status of. By M. A. Carleton 

 and J. S. Chamberlain (U.S.A. Dep. Agr. Bur. PI. Ind., Bull. No. 70, 

 October 1904 ; plates). — This is another contribution to the official 

 literature on a subject which has been engaging the attention of the 

 United States Agricultural Department for some time. It has been at 

 some pains to demonstrate the fitness of the Russian Durum or Macaroni 

 Wheat for growth in many of the semi-arid districts of North America, 

 which arc not favourable to the production of other classes of W 7 heat, and, 

 in consequence of what has been done in this direction, large quantities of 

 Durum Wheat are now being produced in these regions. 



Earlier bulletins, in view of the fact that ordinary flour-millers fought 

 rather shy of the Wheat, at first pressed its claims chiefly as being the only 

 Wheat out of which the semolina for really first-class macaroni can be 

 made, and, in consequence, it has acquired the name of Macaroni Wheat. 

 This the Department now rather deprecates, as it is liable to conceal the 

 fact that in their opinion, once millers and bakers become accustomed to 



