238 EXPEKIMENT STATION EECORD. 



per acre of filler, wrapper, and trash. The decrease in yield and In total value 

 per acre resulting from wider plantings was continuous. The most closely 

 planted tobacco was rather flimsy, perhaps because of immaturity and delayed 

 ripening, but the fact that the entire crop was harvested at the same time was 

 probably unfair to the closer plantings as these were somewhat less mature. 



During the years 1906 and 1907 the total average gain from suckering as 

 compared with allowing the crop to go without attention until cutting time 

 amounted to 340 lbs. per acre or $36 per acre. In 1910 the gain amounted to 

 193 lbs. or $20.07 for twice suckering, and 247 lbs. or $24.53 in case of that 

 suckered 3 times. 



In tests of time of harvesting Zimmer Spanish tobacco in 1909, that which 

 was allowed to stand 25 and 27 days after topping gave 18.81 per cent greater 

 total weight than that which stood only 20 and 22 days. The gain in -wTapper 

 and filler was 13.28 and that in total value 14.23 per cent. In another test 

 tobacco cut 23 and 27 days after topping gave 12.94 per cent greater total weight 

 than that cut 2 days sooner. 9.21 per cent loss in wrapper and filler and 5.56 

 per cent loss in total value. In a third test a crop which stood 27 days showed 

 6.61 per cent greater total weight than that which stood only 22 days, 4.44 per 

 cent gain in wrapper and fiUpr and 4.92 per cent gain in total value, while that 

 which stood 32 days showed gains of 10.62, 10, and 10.11 per cent, resi>ectively. 



In 1910 cuttings were made 2, 3, 4, 5, and 6 weeks after topping. The 

 increase in yield of wrapper and filler and in total value was continuous up 

 to the last cutting. In case of 3 hybrids cut in part 4 weeks after topping and 

 in part 4 days later disunct gains in yield and value were observed. These 

 hybrids were top suckered just before the first cutting. 



Among 34 varieties and hybrids Pennsylvania Broadleaf and Black Seedleaf 

 produced the highest average yields during 1908-1910. Tables indicate also 

 the yields secured in 1910 and the relative merits of hybrids and varieties based 

 upon the yields of their best selections in 1910. 



A table presents an itemized statement of tha cost of each of 13 operations in 

 connection with growing and marketing tobacco as carried on by 7 Zimmer 

 Spanish growers. The author calls attention to the fact that many factors in 

 cost of production remain constant or nearly so and that the important point 

 is not the cost of production per acre but the production cost per unit of product. 

 He estimates that while the 7 farmers quoted spent $44.94 on the operations 

 specified and secured average profits of $47.92, an expenditure of $60 per acre 

 might bring a profit of $65 per acre. A table indicates the rSTommended distri- 

 bution of the expenditure among the various operations. 



Historical and cultural notes on Zimmer Spanish tobacco are followed by 

 briefer notes on a number of other varieties. 



[Tobacco varieties and tests in Imosk and Sinj], K. Preissecker (Fachl. 

 Mitt. Osterr. Tabakregie, 11 {1911), No. 2, pp. 63-86, pis. 5, figs. 3;'abs. in Bol. 

 Tec. Coltiv. TahaccM [Scafati], 10 (l&ll), No. 5, pp. 283-29-'/ ) .—A statement 

 of the principal tobacco varieties grown in Dalmatia and of data obtained in 

 tests of a number of hybrids accompanies discussions of the commercial status 

 of tobacco in Bosnia, Herzegovina, and Japan. 



The use of artificial heat in curing cigar-leaf tobacco, W. W. Garner ( U. S. 

 Dept. Agr., Bur. Plant Indus. Bui. 2.'fl, pp. 25, figs. 4)- — This bulletin presents 

 in popular form some results of several years' experiments in the Oonnecticut 

 valley. 



These tests have proved " that by the use of artificial heat the curing can 

 be successfully accomplished during the most unfavorable weather conditions, 

 and methods for accomplishing this end are outlined." Heretofore the applica- 

 tion of artificial heat in curing cigar tobaccos has been restricted almost en- 



