no opportunity for pollen to be carried fror" the flo7;ers 

 of one plant to those of another, the numher of seeds per 

 pod was 2.2£.--a'bout the same as when the flowers under 

 netting were not artificially tripped. These figures 

 indicate that flov/ers fertilized with pollen from other 

 plants produce more seed than if they are fertilized 

 with pollen from the same plant. Another experiment, 

 discussed on page , brings out this point more clearly. 



Effect of Protecting the Alfalfa glowers from Sun qnd Tind 

 by a Single Thickness of Mosquito getting hut with 

 Provision for Ready Access of Insects. 



In carrying out the experiments recorded above 

 those plants or portions of the plants from v/hich insects 

 were excluded were protected by a single thickness of 

 fine mosquito netting, arranged in tent-like form by plac- 

 ing it over pieces of wood from four to six feet long. 

 It was observed when the experiments were being carried 

 out that on the different plants those flowers which were 

 enclosed in the covering made by a single thickness of 

 mosquito netting remained In bloom longer, and that the 

 petals seemed to be larger, than on those flowers vjhich 

 7;(ere not enclosed. As it seemed possible that the ef- 

 fect of the slight shade, or possibly the breaking of 

 the force of the wind, might influence the development 

 of seed, an experiment was carried out, in 1908, to ob- 

 tain some information in regard to this point. 



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