75 
The following papers and communications were read at 
the Ordinary and Sectional Meetings of the Society during 
the Session : 
October 3rd, 1882. — “On a vitrified mass of stone from the 
vitrified Fort of Glen Nevis,” by Dr. R. Angus Smith, F.R.S., &c. 
“ On a Compound Rainbow,” by R. F. Gwyther, M.A. 
October §th, 1882. — “ On a series of preparations from the Coal 
Measures illustrating the present state of our knowledge of the 
relations between Lepidodendron, Sigillaria, and Stigmaria,” by 
Professor W. C. Williamson, F.R.S. 
October 17th, 1882.— “Note on the Development of Living 
Germs in Water,” by Dr. R. Angus Smith, F.R.S. 
“On the Formula for the Intensity of Light transmitted 
through an Absorbing Medium, as deduced from Experiment,” by 
James Bottomley, B.A., D.Sc. 
“ On the Intensity of Light that has been transmitted through 
an Absorbing Medium in which the Density of the Colouring Mat- 
ter is a function of the distance traversed,” by James Bottomley, 
B.A., D.Sc. 
“The Death-age in Langweis (Switzerland),” drawn up by 
Arthur W. Waters, F.G.S., F.L.S. 
October 31s£, 1882.— “Belted Skew Pulleys,” by Archibald 
Sandeman, M.A. 
“Note on the Dimensions of Ships,” by J. P. Joule, D.C.L., 
LL.D., F.R.S. 
“ On the Coffee Leaf Disease of Ceylon, illustrated by prepara- 
tions for examination under the microscope,” by H. Marshall 
Ward, B.A., Fellow of Owens College. Communicated by Profes- 
sor Osborne Reynolds, F.R.S. 
November 14 th, 1882. — “On Singular Solutions of Differential 
Equations,” by Robert Rawson, Esq., Hon. Mem., Assoc.I.N.A., 
Mem. of the London Mathematical Society. 
November 28 th, 1882. — “On the Transformation of a Logical 
Proposition containing a Single Relative Term,” by Joseph John 
Murphy, F.G.S. Communicated by the Rev. Robert Harley, F.R.S. 
