PROCEEDINGS 
THE LITERARY AND PHILOSOPHICAL 
SOCIETY. 
1857. No. 1. 
Ordinary Meeting, October 6th, 1857. 
Dr. Joule in the Chair. 
Mr. Hopkins gave an account of the Fall of Rain in his 
garden, Broughton-lane, Cheetham, in the first nine months 
of the present year, and of that in the same time of the two 
previous years, viz. : — 
In the first nine months of 
00 
J) 5J 
1856... 
... 22.90 „ 
3? 33 
1855... 
... 1P.22 „ 
Dr. ScHUNCK read a paper 
“ On 
a Yellow Colouring 
Matter obtained from the Leaves of the Polygonum Fago- 
pyrum, or common Buckwheat.” 
It has been stated that the Polygonum Fagopyrum yields 
by fermentation indigo-blue. The author was unable to 
obtain a trace of that colouring matter from the plant, but on 
examination it was found to afford a yellow colouring matter 
in rather considerable quantity. This colouring matter crys- 
