NATURAL SCIENCES OP PHILADELPHIA. 11 



fertilization with the apple. In the latter case, if found true, it 

 would liaA'e an important bearing on the question often mooted, 

 whether cross-fertilization effected change immediatel}' in the fruit 

 impregnated, or that change only appeared after the germination 

 of the impregnated seeds. In the case of A'arieties of Indian-corn, 

 we know the change is immediate ; and it was generally belicA'ed 

 some cucurhitaceous plants furnished similar facts ; but he thought 

 it had not been known in other plants, especially in the case of 

 species as distinct as were the apple and the pear. 



January 31. 

 Mr. Jos. Jeanes in the chair. 

 Twenty-two members present. 



The report of the Biological and Microscopical Section was 

 presented. 



Twenty members not being present when the election of com- 

 mittees was in order, the committees elected in 1870 were con- 

 tinued for 1811. 



The election of members was postponed until the next business 

 meeting. 



On favorable report of the committee, the following paper was 

 ordered to be published : — 



1871.] 



