76 
December 12 th, 1882. — “On an Elementary Solution of the 
Dynamical Problem of Isochronous Vibration,” by Prof. Osborne 
Reynolds, M.A., F.R.S. 
“ On the Occurrence of Potamogeton Zizii , M. and K., in Lan- 
cashire, and in Westmoreland,” by Charles Bailey, F.L.S. 
“ On the Lincolnshire locality for S 'elinum Garvifolio, L.,” by 
Charles Bailey, F.L.S. 
“ On some of the Besults of a Dredging Excursion at Oban,” by 
R. D. Darbishire, F.G.S. 
January 9 th, 1883. — “On the Change of the Freezing Point of 
a Sensitive Thermometer constructed 39 years ago,” by J. P. 
Joule, D.C.L., LL.D., F.R.S., &c. 
January 23rd, 1883. — “Remarks on the Simultaneous Varia- 
tions of the Barometer recorded by the late John Allan Broun,” 
by Professor Balfour Stewart, F.R.S. 
“ Jeremiah Horrox and William Crabtree, the Observers of the 
Transit of Venus in 1639,” by Mr. John E. Bailey, F.S.A. 
February 3th, 1883. — “Note on the Vapours of Incandescent 
Solids,” by Henry Wilde, Esq. 
“ Remarks on Professor Osborne Reynolds’ paper on Isochronous 
Vibrations,” by Robert Rawson, Esq., Hon. Mem., Assoc.I.N.A., 
Mem. of the London Mathematical Society. 
February 1 2tli, 1883. — “ On the Structure of the Shells of seve- 
ral common species of Polymorphic,” by Thomas Alcock, M.D. 
February 2 §th, 1883. — “ On the use of Lime as a purifier of the 
products of combustion of Coal Gas,” by J. P. Joule, D.C.L., 
LL.D., F.R.S. 
11 Note on the Mammoth Cave,” by Mr. G. Darbyshire. 
March 6th, 1883.— “On the low state of the waters of the 
Rhine,” by Wm. Brockbank, F.G.S. 
“ On the Levenshulme Limestones — a Section from Slade Lane 
eastwards,” by Wm. Brockbank, F.G.S. 
April 3rd, 1883.—“ On the Ash of the Diamond, by Professor 
H. E. Roscoe, LL.D., F.R.S., <fcc., President. 
“ On the Occurrence of Caffeine in the leaves of Tea and Coffee 
grown at Kew Gardens,” by Professor C. Schorlemmer, F.R.S, 
