47 
Ordinary Meeting, February 10th, 1863, 
E. W. Binney, F.R.S., F.G.S., President, in the Chair. 
Mr. G. Stanley Darbishire was elected an Ordinary 
Member of the Society. 
Among other donations which received the thanks of the 
Society, Mr. Parry presented a volume of MS. Lectures on 
Chemistry, by Mr. Thomas Henry, one of the founders of 
the Society, and the father of the late Dr. William Henry, 
the celebrated chemist. 
Dr. Joule described a barometer for measuring small 
atmospheric disturbances. It consists of a large carboy 
connected by a glass tube with a miniature gasometer formed 
by inverting a small platinum crucible over a small vessel of 
water. The crucible is attached to the short end of a finely 
suspended lever multiplying its motion six times. WHien the 
apparatus was raised two feet the index moved through one 
inch ; hence he was able in serene weather to observe the effect 
corresponding to the elevation of less than one inch. The 
barometer is placed in a building, the slated roof of which 
affords, without perceptible draught, free communication with 
the external atmosphere. In this situation it was found that 
the slightest wind caused the index to oscillate, a gale 
occasioning oscillations of two inches, an increase .of pressure 
being generally observed when the gusts took place. 
Dr. Clay exhibited a specimen of the Snake Nut, the fruit 
of the Ophiocaryon parctdoxnm fSchomb.J. Nat. ord. 
Proceedings —Lit. and Phil. Society— No. 8.— Session 18G2-3, 
