30 Proceedings. 



General Meeting, November 14th, 1893. 



Professor Osborne Reynolds, M.A., LL.D., F.R.S., 

 Vice-President, in the Chair. 



Mr. R. L. Taylor, Science Master, Central Schools, 

 Manchester, and Mr. Horace Lamb, M.A., F.R.S., Professor 

 of Mathematics, Owens College, Manchester, were elected 

 as ordinary members. 



Ordinary Meeting, November 14th, 1893. 



Professor Osborne Reynolds, M.A., LL.D., F.R.S., 

 Vice-President, in the Chair. 



The thanks of the members were voted to the donors of 

 the books upon the table. 



Dr. HODGKINSON exhibited a species of orchid (Catase- 

 tum), illustrating the extraordinary means by which 

 fertilization by insect agency is effected in this group of 

 plants. Experimental demonstrations with the antennae 

 were successfully given. 



Mr. Francis Jones, F.R.S.Ed., exhibited specimens of 

 polished white marble exposed on the top of the Grammar 

 School and at Alexandra Park for one year to atmospheric 

 influences. The first-named specimen showed a loss of 1 per 

 cent of its original weight, and the other a loss of 0'2 per 

 cent. ; whereas a third specimen kept in a room showed no 

 loss whatever. The utility of the experiment as a test 

 of the purity of air and its bearing on the wasting of exposed 

 marble statues were pointed out. 



