SlCClvSSI XL I'LA.M BKEEUING. 



In order to produce a new strain of tobacco, the Connecticut Experiment Station crossed tlie 

 Cuban Havana type, which has very large leaves but only a few of them, with the Sumatra 

 type, which has numerous leaves, but only small ones. The offspring of this cross showed 

 the characteristics of both parents in a blend, but in the following, or second filial (Fj) 

 generation, the characters segregated, in accordance with the usual Mendelian procedure, 

 so that some of the plants looked like the Havana grandparent and others like the Sumatra 

 grandparent, as is shown in the other photographs illustrating this article. Among the 

 forms produced by the cross were several that approximated the desired result, one of 

 which is shown in figure 20. In the above illustration is the final result — the sought-for 

 variety, which has been given the name of "Halladay Havana." It retains the large size 

 of leaf of the Cuban Havana type to a marked degree, but thanks to the infusion of Suma- 

 tra "blood" has more leaves than the Havana. Two distinct types of this variety are 

 recognized, as shown in the above photograph, the one at the left bearing smooth, droop- 

 ing leaves, and the one at the right erect, crinkly leaves. The photograjjhs do not accu- 

 rately represent the number of leaves borne by this new variety, liowever, for the reason 

 that a first picking of five or six leaves has already been made from eacli one. (Figure 18.) 



42 



