DESCRIPTION OF PLATES. 



Plate I. Fig. 1. — A field of tobacco raised in Connecticut from imported 

 Cuban seed. The result of using unselected Cuban-grown seed in the 

 Connecticut Valley can be seen from a careful examination of this illus- 

 tration, which shows a typical instance of the breaking up in the type of 

 tobacco, due to the abrupt change of soil and climatic conditions. The 

 branching type of plants bearing small leaves, constituting about one- 

 third of the total number of plants in the field, was absolutely worthless 

 for cigar-wrapper production, and many of the other variations from the 

 normal Cuban type were of inferior quality, thus greatly reducing the 

 yield and value of the crop. Fig. 2. — This uniform field of tobacco was 

 produced by carefully selecting for seed production the best plants in the 

 field shown in figure 1. and protecting the flowers from cross-pollination 

 by the use of paper bags for two seasons. The undesirable types of plants 

 were eliminated by this practise, and a uniform and desirable type secured, 

 adapted to the soil and- climatic conditions in Connecticut. 



Plate II. Fig. 1. — This type of plant found in Connecticut fields grown from 

 freshly imported Cuban tobacco seed was selected for propagation. Fig. 

 2. — The progeny of a single Connecticut Cuban seed plant, similar to 

 figure 1. showing the uniformity of type of plants grown from self- 

 fertilized seed, and the marked similarity of every plant to the type of 

 the parent seed plant. 



Plate III. The two uniform types of tobacco shown in this illustration were 

 produced by sowing the seed of typical plants of these types growing in the 

 same field and under similar conditions, free from cross-fertilization. 

 These types of tobacco have been improved by careful selection of the 

 best individual plants from year to year adapted to the purpose for 

 which each type is produced. This experiment has demonstrated that 

 the size, shape, venation of leaves, and other characters of tobacco 

 plants can be propagated uniformly every year by judicious selection of 

 seed plants of the type desired and the saving of the seed under bag. 



Plate IV. The introduction of Florida-grown Sumatra tobacco seed in the 

 Connecticut Valley was followed by a breaking up of the type of this tobacco. 

 Among these types, few of which were desirable, and many undesirable, the 

 two types shown in this illustration were found. The seeds of typical 

 plants of these types were saved under bags, from which uniform strains 

 were produced the following season. Both of these types of tobacco are 

 valuable for growing under shade, and the two rows, one of each type. 

 growing side by side, offer incontrovertible proof of the value of the methods 

 of seed selection described in this bulletin in the production of uniform 

 types of tobacco. 



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