138 
“ On tlie Structure of Stigmaria,” by Professor W. C. William- 
son, F.P.S. 
December 1874. — ‘‘Some Doubts in regard to the Law of 
Diffusion of Gases, by Henry H. Howortli, Esq. 
December 1th, 1874. — “On CEcophara Woodiella,” by Josepli 
Sidebotham, F.R.A.S. 
December IWi, 1874. — “Some Particulars respecting the Hegro 
of the Neighbourhood of the Congo, West Africa,” by Watson 
Smith, F.C.S. 
“Anatysis of One of the Trefriw Mineral Waters,” by Thomas 
Carnelley, B.Sc. Communicated by Professor H. E. Roscoe, 
F.R.S., &c. 
December 1874. — “On a Case of Reversed Chemical 
Action,” by James Bottomley, B.Sc. 
January \Wi, 1875. — “On the Sewerage of Towns and the 
Pollution of Rivers and Streams,” by E. W. Binney, F.R.S., V.P. 
“On the Action of Rain to Calm the Sea,” by Professor Osborne 
Reynolds, M.A. 
“On the Stone Mining Tools from Alderley Edge,” by Professor 
W. Boyd Dawkins, F.R.S. 
“Archaic Iron Mining Tools from Lead Mines near Castleton,” 
by Rooke Pennington, LL.B. 
January 18^/q 1875. — “On the Botany of Wilmington, North 
Carolina,” by James Cosmo Melvill, M.A., F.L.S. 
January 2Qth, 1875. — “A Descent into Elden Hole, Derby- 
shire,” by Rooke Pennington, LL.B. 
“Certain Lines observed in Snow Crystals,” by Arthur Wm, 
Waters, F.G.S. 
February 2nd, 1875. — ^“Results of Meteorological Observations 
taken at Langdale, Dimbula, Ceylon, in the year 1873,” by 
Edward Heelis, Esq. Communicated by Joseph Baxendell, 
F.R.A.S. 
February Wi, 1875. — “A Method of Finding the Axes of an 
Ellipse when two Conjugate Diameters are given,” by J. B. Millar, 
B.E. Communicated by Professor 0. Re^molds, M.A. 
