Proceedings. 71 



General Meeting, January loth, 1893. 



Professor A. Schuster, Ph.D., F.R.S., F.R.A.S., President, 

 in the Chair. 



Mr. W. J. Chadwick, Optician, 2, St. Mary's Street, 

 Manchester, was elected an ordinary member. 



Ordinary Meeting, January loth, 1893. 



Professor A. Schuster, Ph.D., F.R.S., F.R. A. S., President, 

 in the Chair. 



The thanks of the members were voted to the donors 

 of the books upon the table. 



A conversation on alternations of temperature on high 

 mountains followed an inquiry from Dr. HODGKINSON 

 as to the proper method of treating a consignment of orchids 

 from an elevation of 9,000 feet in the tropical Andes. 

 Professor Schuster pointed out that it would be necessary 

 to know the exact locality before forming an opinion, 

 as within comparatively short distances there are great 

 differences in the rainfall on high mountains, as, for instance, 

 between the northern and southern slopes of the Himalayas, 

 and great daily variations of temperature. 



Professor SCHUSTER alluded to the recent announcement 

 that black diamonds had been discovered distributed through 

 meteoric iron, and Dr. Reynolds suggested a relation 

 between them and apparently analogous formations in cast 

 iron. 



