No. 565] CHANGES PRODUCED BY SELECTION 9 



from a variety that had been grown for a number of years 

 at G-ranby, Connecticut. It averages about 20 leaves per 

 plant although ranging from 16 to 25 leaves. The aver- 

 age height is about 1.4 m. and the average leaf area about 

 7 sq. dm. The "Sumatra" parent was a type specimen 

 of a variety that had been introduced into Connecticut to 

 be grown under cloth shade. It averages between 26 and 

 27 leaves per plant with a range of from 21 to 32 leaves. 

 The average height is nearly 2.0 m., but the average leaf 

 area is only about 3 sq. dm. 



According to Shamel, the first hybrid generation of 

 this cross developed somewhat more vigorously than the 

 parent types and was uniform in its habit of growth. 

 The second generation, he thought, was hardly more vari- 

 able than the first. Several F 3 families, the progeny of 

 inbred F 2 individuals, were grown in 1906 and proved to 

 be a variable lot. One of these plants produced 26 small, 

 round-pointed leaves with short internodes between them. 

 This plant was thought by Mr. E. Halladay, upon whose 

 farm the experiment was conducted, and Mr. J. B. Stewart, 

 of the U. S. Department of Agriculture, to be worth sav- 

 ing from its promise of producing a desirable commercial 

 type. 



In 1907 the Department of Agriculture made an agree- 

 ment with Mr. Halladay to grow two acres of tobacco for 

 experimental purposes, and on his own initiative Mr. 

 Halladay grew a number of plants from inbred seed of 

 the one that bore 26 leaves. This selection, numbered 2 

 h-29 in accordance with the department nomenclature, 

 was comparatively uniform in appearance and several 

 plants were selfed. In Mr. Halladay's absence, how- 

 ever, all of the plants were "topped," except one that 

 happened to be rather late. This plant was selfed. It 

 had 26 medium-sized, round leaves and grew to about the 

 same height as the Connecticut Havana. 



In view of Mr. Halladay 's high opinion of the type, the 

 seed of this plant and the remaining seed of its parent 

 were planted in 1908. The plants of this generation pre- 

 sented a uniform appearance and promised a high grade 



