188 
On the Structure of Stigmaria,” by Professor W. C. William- 
son, F.R.S. 
December 1874. — “Some Doubts in regard to the Law of 
Diffusion of Gases, by Henry H. Howorth, Esq. 
December Itk, 1874. —“On (Ecophara Woodiella,” by Joseph 
Sidebotham, F.R.A.^. 
December 1874. — -“Some Particulars respecting the Negro 
of the Neighbourhood of the Congo, West Africa,” by AVatson 
Smith, F.C.S. 
“Analysis of One of the Trefriw Mineral Waters,” by Thomas 
Carnelley, B.Sc. Communicated by Professor H. E. Roscoe, 
F.R.S., Ac. 
December 1874. — “On a Case of Reversed Chemical 
Action,” by James Bottomley, B.Sc. 
Jaimary 12th, 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 IWi, 1875. — “On the Botany of AYilmington, 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 Win, 
AVaters, F.C.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 ^th, 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. Reynolds, M.A. 
