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“ On the Alleged Action of Cold in rendering Iron and Steel 
brittle,” by J. P. Joule, D.C.L., F.R.S., Ac., Vice-President. 
“ On the Effect of Cold on the Strength of Iron,” by Peter 
Spence, F.C.S., Ac. 
January 2ith, 1871. — “ On the Effect of Cold on the Strength 
of Iron,” by Mr. William H. Johnson. 
“ Experiments on the Oxidation of Iron,” by Professor F. Crace 
Calvert, Ph.D., F.R.S., Ac. 
January 30 th, 1871. — “On Fossilization,” by W. Boyd Dawkins, 
F.R.S. 
“ On the Structure of Some Specimens of Stigmaria,” by Pro- 
fessor W. C. Williamson, F.R.S. 
“ On the Cultivation of Madder in Derbyshire,” by Joseph 
Sidebotham, F.R.A.S. 
February 7 th, 1871. — “ On the Organisation of an Undescribed 
Verticillate Strobilus from the Lower Coal Measures of Lancashire,” 
by Professor W. C. Williamson, F.R.S. 
“ The Tails of Comets, the Solar Corona, and the Aurora, con- 
sidered as Electric Phenomena, Part II.,” by Professor Osborne 
Reynolds, M.A. 
“ Further Experiments on the Effects of Cold upon Cast Iron,” 
by Peter Spence, F.C.S., Ac. 
February 21 st, 1871. — “ The Overthrow of the Science of Electro- 
Dynamics,” by John Hopkinson, D.Sc. 
“ Remarks on Mr. Spence’s Experiments on the Effects of Cold 
on the Strength of Cast Iron,” by Joseph Baxendell, F.R.A.S. 
“ Further Observations on the Strength of Garden Nails,” by 
J. P. Joule, D.C.L., F.R.S., Ac. 
“ On the Action of Sulphurous Acid on Phosphates,” by Dr. 
B. W. Gerland. Communicated by Dr. R. Angus Smith, F.R.S., Ac. 
February 27th, 1871. — “ Notes on Polygonum minus and its 
allies,” by Mr. G. E. Hunt. 
March 7th, 1871. — “Further Observations on the Strength of 
Garden Nails,” by J. P. Joule, LL.D., F.R.S., V.P. 
“On Anthraflavic Acid, a Yellow colouring Matter accompany- 
ing Artificial Alizarine,” by Edward Schunck, Ph.D., F.R.S., V.P. 
