830 EXPERIMENT STATION RECORD. 



eluded that the strong solutions of sulphuric acid and of copper sulphate sup- 

 pressed sprouting for the longer periods, and growth was almost entirely pre- 

 vented in the hydrochloric acid series. The wealier concentrations of sul- 

 phuric acid and hydrochloric acid somewhat retarded sprouting and later de- 

 velopment of the sprouts. Carbon dioxid seemed to delay sprouting, but it was 

 hastened by the action of sodium chlorid and carbon monoxid. 



Group classification and varietal descriptions of some American potatoes, 

 W. Stuart {U. S. Dcpt. Agr. Bill. 116 {101.')), pp. 56, pis. 19).— In order to 

 aid the student and grower of potatoes, the author has in this bulletin classi- 

 fied Imown varieties into eleven groups, each named from the most typical 

 well-known variety in the group. A key, describing the tubers, sprouts, and 

 flowers of each group is presented, followed by detailed group descriptions 

 and a list of varieties belongin'^ thereto. Varietal descriptions of varieties, 

 arranged alphabetically, occupy the bulk of the bulletin. 



Improvement of the seed potato, G. ^Martinet (Ann. Agr. Suisse, 15 (1914), 

 No. 2, pp. 2^2-253, figs. 10). — This article notes variations due to apparent 

 grafting of undergi'ound stocks and to selections. 



Utilization of potatoes in Europe, R. P. Skinner ( U. 8. Dept. Com., Spec. 

 Cons. Rpts., No. 64 (1914), pp. 8-15, 18, 19, 33-^^).— These pages contain data 

 compiled from reports of consular officers in European countries, especially 

 Germany, showing the development of the potato industry and the value, costs, 

 and uses of products manufactured from potatoes, starch, alcohol, and dried 

 potatoes. Reference is made to the opportunities of American farmers in manu- 

 facturing potato products. 



On the pollination and crossing' of rice, S. Ikeno {Ztschr. PflanzenzUcht., 2 

 (1914), No. 4» PP- 495-503, figs. 2). — This article discusses the method of open- 

 ing of the rice flower, and notes observations confirming the work of earlier in- 

 vestigators that rice seldom, if ever, cross- poll inizes in nature. The results of 

 reciprocal crosses between a variety of common rice and one of a glutinous 

 type show the colors and endosi^erm characters to mendelize in the F- gen- 

 eration. 



The correlative relations of the internodes of a stalk to itself and the 

 determination of the stalk structure as a guide in selection of nonlodging 

 cereals, demonstrated with rye, H. Peahn-Appiani (Ztschr. Pflanzenziicht., 2 

 (1914), No. 4, pp. 461-494, figs. 2).— This article gives the results of tests of 

 bending and breaking stresses of rye straw in full lengths and in internode by 

 internode lengths. 



[Soy beans], N. Gill (Ann. Rpt. Kumaun Govt. Gardens, 1913-14. pp. 2-4). — 

 This article gives the results of tests with several varieties of soy beans on 

 soils, the chemical and physical analyses of which are given. The data show 

 yields, oil percentage, moisture, ash content, and weight of 100 seeds. 



Spacing experiments in sugar beet cultivation in Hungary in 1913, B. 

 VON Jancso (Osterr. Ungar. Ztschr. Zuclcerindus. u. Liindic, 43 (1914), ^o. 5, 

 pp. 685-694). — Reports from 16 centers at which beets were spaced 8 and 10 

 in. apart in rows spaced from 14 to IS in. apart showed the most favorable 

 results by spacing 8 by 14 in., as compared with 10 by 14 in. the preceding 

 season (E. S. R., 31, p. 334). It is noted, however, that 8 by 16 in. and 

 10 by 14 in. gave nearly as good results as the 8 by 14 in. It is stated that 

 this was a very favoi'able season for the development of the sugar beet in 

 Hungary. 



Drilling fertilize^ experiments with sugar beets in Hungary in 1913, J. 

 GyArfAs (Osterr. Ungar. Ztschr. Ziickerindus. u. Landw., 43 (1914), No. 5, pp. 

 675-68/,).— This continued previous work (E. S. R., 30. p. 529; 32, p. 230) and 

 with similar results. The effect of drilling superphosphate and nitrate of soda, 



