EXPERIMENT STATION BULLETINS. 297 



thus pollinated were very small, averaging about 1 inch in diameter and 

 weighing only from 20 to 40 grams, as compared with an average weight 

 of 78 grams for the liberally-pollinated fruits. On cutting them open but 

 one or two seeds were found in most cases, sometimes none; while a 

 large forced tomato, well pollinated, usually contains about 230 seeds. 

 These results indicate that, up to a certain limit, the more pollen the 

 more! seeds; and that the more numerous the seeds the larger the 

 tomato, as a rule. 



RESULTS OF CROSS-POLLINATION OF TOMATOES IN 1906. 



The results with all three varieties showed that it was not necessary 

 to cross pollinate them in order to obtain a good crop of large tomatoes. 

 The self-pollinated blossoms set as well as the cross-pollinated, and 

 there was practically no difference in the appearance or weight. On 

 Frogmore the self-pollinated fruits weighed slightly more. The other 

 two varieties showed no decisive benefit from cross-pollination. 



Name of variety or cross. ^a^of 4e?ght^ 



Lorillard, self-pollinated 42 82 grams 



Lorillard X Frogmore 39 84 .9 grams 



Lorillard X Best-of-All 26 80.5 grams 



Frogmore, self-pollinated 39 74 grams 



Frogmore X Lorillard 39 65 .8 grams 



Frogmore X Best-of-All 41 70 grams 



Best-of-AlI, self-pollinated 46 75.4 grams 



Best-of-All X Lorillard 40 74 . 8 grams 



Best-of-All X Frogmore 55 75.6 grams 



4 



Average weight of self-pollinated fruits 77.1 grams 



Average weight of cross-pollinated fruits 75.2 grams 



The difference between the self and cross-pollinated fruits is so slight 

 that we have concluded that these varieties were not benefited by cross- 

 pollination. 



EXPERIMENT OF 1907. 



The experiment was conducted along the same lines and under the 

 same conditions as that of the previous year, but with different varieties, 

 Stirling Castle, Earliana and Ignotum being used. 



Stirling Castle is a typical forcing tomato, generally having three 

 cells, but sometimes two or four. It is very uniform in size and shape, 

 small and not very bright in color. Earliana is much larger than 

 Stirling Castle, is more crimson, but varies greatly in size and is gen- 

 erally quite irregular in shape. It is too irregular, and has too much 

 "waste" to make a good forcing variety. Ignotum is a large, flat tomato, 

 bright red and generally smooth, but varies considerably. 



Methods. Seeds were sown the latter part of November. The plants 

 were transplanted twice and put into four inch pots the first week 

 in January. On February 10th they were transplanted into the bed 

 used for the experiment in 1906. The plants were then topped and 

 trained on the two-stem system. Emasculating and pollinating began as 



38 



