238 EXPERTMENT STATION RECORD. [Vol.38 



The action of copper arsenate and arsenious acid on sugar cane roots, 

 E. jAKVi.s {QueensUnid Affr. Jour., n. ser., 7 (1917), No. 2, pp. 79, 80).— This is 

 a preliminary report of the effect of copper arsenate and arsenious acid on 

 sugar cane roots A'hen used as a poison bait for grubs. 



Short "sets" of " badila " cane planted in earthenware pots, repre.senting 

 treatments of 113 and 226 lbs. of I'aris gi-een per acre, produced shoots which 

 at the end of six weeks averaged 10 in. in height as compared with '^.5 In. 

 for untreated checks. A maximum growth of 27 in. was attained in the pot 

 representing a 226-lb. application. The average height of cane attained after 

 six weeks' growth with from 100- to 200-lb. applications of commercial white 

 arsenate was 27.8 in., as compared with 2G in. for the untreated check. 



Concerning the progeny of plus and minus variants from pure lines of 

 tobacco, II. .Ienskn (Procfstat. Vorstenland. Tfihak [Dutch East Indies^, Mcded. 

 24 (1916), pp. il-56, pis. 2; abs. in Internat. Inst. Agr., Intcrnat. Rev. Sci. wnd 

 Pract. Agr., 8 (1917), No. 5, pp. 720-722). — Observations are reported on the 

 offspring of large and small plants (3.9 to 7.3 ft in height) and of wide- and 

 narrow-leafed plants. 



The results with different-sized plants indicated that large and small mother 

 plants of a pure line produce offspring of the same height. Two pure lines 

 were observed in regard to leaf width, one producing offspring which fluctuated 

 around the parent plant (that is, around the plus or minus variants), while 

 plus variants of a pure line, known as the WY-line, produced offspring having 

 as narrow leaves as the minus variant. 



Planting tests with tobacco, O. de Vries and E. Sidenius (Proefstat. Vor- 

 stenland. Tahak. [Dutch East Indies], Meded. 27 (1916), pp. 85). — This reports 

 tests to determine the effect of different planting distances upon (1) yield as 

 expressed by grams per plant, kilograms per plat, and percentage of first- 

 length leaves, and (2) quality and color. The tests were conducted at a num- 

 ber of centers from 1910 to 1915 and included seven uifferent planting distances. 



The results obtained indicated that the yield per plant was least with close 

 planting, M'hile the greatest variation in individual plants was obtained in the 

 wide plantings. The highest yield per plat was obtained from close plantings. 

 Greater leaf length was obtained from wide plantings. In regard to quality 

 and color, the best results were reported from close plantings on good soils, 

 the improved quality and color, together with increased yield, fully compensat- 

 ing any loss in length. 



[Report of field experiments with tobacco, 1898-1911], M. Raciboeski, 

 H. .Jensen, and O. de Vuies (Procfstat. Yorstenland. Tahak [Dutch East Itidics], 

 Meded. 5 (WIS), pp. 70-121, 131-136, 138-196, 199-215, pis. U, figs. 6).— Selec- 

 tions within pure lines, the testing of new varieties, and hybridization studies 

 are reported, the latter being discussed at some length and the results ob- 

 tained from numerous crosses illustrated. Extensive field experiments are 

 reported pertaining to the seed, development of the seedling, various systems 

 of seed-bed management, studies of the plant in the field, green manuring, use 

 of stable manure, irrigation, influence of different factors on tobacco culture, 

 fermentation studies, and combustion studies. 



A report of tobacco studies near Deli, O. de Vries (Proefstat. Vorstenland. 

 Tahak [Dutch East Indies], Meded. 6 (1914), pp. 20-30). — Climatic conditions, 

 cultural practices, fermentation processes, and marketing facilities encountered 

 in the course of tobacco investigations near Deli are briefly reviewed. 



Tobacco culture, R. A. AV. Soesman (Proefstat. Vorstenland. Tahak [Dutch 

 East Indies], Meded. 13 [1915], pp. 10, pis. .i).— Field practices in tobacco cul- 

 tivation on the Crown lands of the Dutch East Indies are described in some 

 detail. 



