The inheritance of certain Quantitative Characters in Tobacco. 117 
Different generations of the parent types have been grown to 
I YI 8 
compare with the crosses and also to give an idea of the variability 
of the parents. 
Fig. 1. 403. Sumatra. Averages about 27 leaves per plant. 
The parents have each been given a number; as Sumatra, 403, 
Broadleaf, 401. A cross between them has been designated as 403 >< 
40I, the female parent appearing first. Later generations have been 
grown as (403 >< 40I)—I, (403 = 40I)—2 etc. 
The counts of leaf number with which this article deals were 
made from the fourth leaf from the bottom to the leaf below the 
bald sucker at the top. This represents the number of leaves usually 
