136 . EXPEEIMENT STATION KECOED. 



used by the author. The comparative exactness of the three methods, actual 

 count, count-percentage method, and count-percentage method with averages 

 are indicated as 58 : 37 : 25. 



As a measure of the agricultural value of beet seeds the author tried several 

 methods of weighing 100 germinating seeds within definite periods. This 

 proved satisfactory, as this weight bore a direct relation to the vigor of the 

 germ. 



Besults of work in breeding and selection and of observations on vari- 

 ability and the correlation of variability with sugar cane, carried on at 

 the sugar factory at Sempalwadak, Java, R. A. Qxjintus (Arch. Suikerindiis. 

 Nederland. Indie, 22 (1914), No. 39-40, pp. 1369-1495, pis. g2).— The work 

 here reported was carried on in 1911, 1912, and 1913. The studies were made 

 in regard to heredity as influenced by selection in both sexual and vegetative 

 methods of propagation with pure lines and hybrids of sugar cane. Variability 

 and the correlation of variability in regard to the production of the crops are 

 discussed. 



The author concludes that with self-fertilized sugar cane the inheritance of 

 characters follows closely Galton's law of regression. Deviations either within 

 pure lines or in hybridization do not seem to be inherited. In hybridizing it 

 appears that the individual parental characters follow Mendel's law in the 

 second generation. Some characteristics such as thickness, tillering, and sugar 

 content do not seem to be inherited. There is a negative correlation between 

 cane weight and percentage of sugar in the juice, and a positive correlation be- 

 tween the cane weight and sugar yield. 



The structure of the stomata of the sugar cane, J. Ktjypeb (Meded. Proef- 

 stat. Java-SuiJcerindus., 5 {1914), No. 1, pp. 12, pis. 2, fig. 1; Arch. Suilcerindus. 

 Nederland. Indie, 22 (.1914), No. 41, pp. 1679-1690, pis. 2, fig. i).— This article 

 gives results of microscopical examinations of the parts of the stomata, in- 

 cluding guard cells, accessory cells, and the movement mechanism of the stoma 

 cells. 



Sugar cane, its cultivation and gul manufacture, J. B. Knight (Dept. Agr. 

 Bombay Bui. 61 (1914), PP- 41) • — This bulletin discusses the methods of pro- 

 ducing sugar cane, including the planting methods known as the Gujarat, 

 Mauritius, Poona, row system, and Java system, and pests and diseases. 



Conservation of soil moisture in the cane fields, J. T. Crawley and W. B. 

 Cady (Porto Rico Bd. Agr. Expt. Sta. Bill. 8 (1915), pp. 7-5).— This gives the 

 results of a field test in which the soil to the depth of 1 ft. under a 6-in. mulch 

 of cane trash showed a weekly average from September S, 1913, to June 1, 1914, 

 of 2.2 per cent more moisture than soil which had been cultivated, and 4.1 per 

 cent more than soil that was left fallow, neither cultivated nor mulched. 



Stripping of cane, J. T. Crawley (Porto Rico Bd. Agr. Eoppt. Sta. Bui. 8 

 {1915), pp. 10-16). — ^This gives results of two seasons' work as to the advan- 

 tages in stripping the dead leaves and suckers from the growing cane. The 

 averages for the season 1912-13 for stripped and unstripped cane are given as 

 38.16 and 3S.04 tons of cane, 15.44 and 15.46 Brix, 13.23 and 13.19 per cent of 

 sucrose, and 85.6 and 85.3 per cent of purity, respectively. For the .season 

 1913-14 the figures are 20.85 and 21.28, 17.01 and 17.04, 14.86 and 15.06, and 

 87.4 and 88.3, respectively. 



Using cane tops for planting, A. H. Rosenfei.d (Internat. Bugar' Jour., It 

 {1915), No. 193, pp. 16-18). — This article gives results during the first and 

 second years of using the upper third of the stalk for planting, this practice 

 being based on its lesser value as a sugar-producing part. The data show a 

 smaller yield from the cane tops the first year, but there was much less differ- 

 ence the second year between the cane tops and ordinary cane in yield per acre. 



