HORTICULTURE. 435 



Growing Irish potatoes in Georgia, T. H. McHatton {Bui. Oa. State Col. 

 Agr., No. 95 (1915), pp. 6). — This suggests methods of production for the first 

 and second crops. 



The frequency of low temperature in Vercelli and the effect on the culti- 

 vation of rice, B. Makcarelli [Gior. Risicolt., 5 (1915), No. 22, pp. 355-360, 

 fig. i).— In view of the fact that the temperature falls below 15° C. (59° F.) 

 in July and August only the early varieties of rice are recommended. 



Ash composition of upland rice at various stages of growth, P. L. GrLE and 

 J. O, Cakeero (U. S. Dcpt. Agr., Jour. Agr. Research, 5 (1915), No. 9, pp. 357- 

 S64). — This gives results of work carried out at the Porto Rico Federal Station, 

 which show the v\'eights of various parts of uphmd rice (Oryza sativa) and the 

 ash analysis of both the roots and above-ground parts when the plants were 

 harvested at 18, 26, 48, 73, 103, and 123 days of age. 



The absolute weiglits of the asli constituents of one whole plant above-ground 

 at the ages of 103 and 123 days are given as follows: Carbon-free ash 4.427, 

 5.306 gm. ; silica, 3.245, 3.S96 ; lime, 0.102, 0.094 ; magnesia, 0.137, 0.137 ; iron, 

 0.012, 0.015 ; potash, 0.33, 0.655 ; soda, 0.337, 0.235 ; phosphoric acid, 0.172, 0.17 ; 

 sulphuric acid, 0.277, 0.297 ; chlorin, 0.13, 0.152 ; and nitrogen, 0.143, 0.154 gm., 

 respectively. 



" The percentages of potash, phosphoric acid, and sulphur in the ash of the 

 whole plant above-gi*ound decreased witli the age of the plant, while silica in- 

 creased and nitrogen in the dry matter decreased with the age. As compared 

 with 103 days, when the panicles were just out, the mature plant above-ground 

 at 123 days with the seeds ripe contained an equal amount of lime, magnesia, and 

 phosphoric acid, slightly more ix'on, sulphur, chlorin, nitrogen, and silica, much 

 less soda, and considerably more potash. The percentages of iron in the ash of 

 the green leaves and straw decreased regularly and markedly with the age of 

 the plant, while the percentages of iron in the ash of the v.-hole plant above- 

 ground remained fairly constant after the 26-day-old sample. Previous to flow- 

 ering the percentages of di-y matter in the green plant and of ash in the dry 

 matter seemed to be influenced by the effect of the weather on the growth of the 

 plant." 



Importance and character of the milled rice imported into the United 

 States, F. B. Wise (U. S. Dcpt. Agr. Bui. 323 (1915), pp. 8, pi. 1, fig. i).— This 

 bulletin discusses the quantity and value of rice imported and the countries from 

 which rice is imported, describes rice types, and gives in tabular form the results 

 of mechanical and chemical analyses of imported rice. 



The romance of teff, J. Buett-Davy (Univ. Cal. Jour. Agr., 3 (1915), No. 1, 

 pp. 7-10). — This gives a brief history of teff from its cultivation in Abyssinia 

 to its present distribution in South Africa, and describes its cultivation and uses 

 in South Africa. An analysis of teff hay is given as moisture 8.S8, protein 6.21, 

 ether extract 1.21, soluble carbohydrates 39.08, crude fiber 39.07, and ash 5.55 

 per cent. 



HORTICTJLTURE. 



The Bradley bibliography. — III, Arboriculture — economic properties of 

 woody plants, A. Rehder (Cambridge, Mass.: Riverside Press, 1915, vol. 3, pp. 

 A +806). —This volume of the Bradley Bibliography (E. S. R., 31, p. 239) con- 

 tains the titles of publications relating to arboriculture and to the economic 

 properties and uses of woody plants, including important articles in periodicals 

 and other serial publications. The principal botanical, horticultural, agricul- 

 tural, and pharmaceutical periodicals have been completely excerpted, and 

 many papers extracted from less important technical periodicals and from 



