[ xii ] 
VII. On the Meteorology of the Lake District of Cumberland and Westmoreland ; with 
a continuation of the Results of Experiments on the Fall of Rain at various 
heights, up to 3166 feet above the sea level. By John Fletcher Miller, F.R.S., 
F.R.A.S., Assoc. Inst. C.E. Communicated by Lieut. -Colonel Sabine, For. Sec. 
R.S page 149 
VIII. On the Structure of the Mernbrana Tympani in the Human Ear. By Joseph 
Toynbee, F.R.S., Fellow of the Royal College of Surgeons of England, Aural 
Surgeon to St. Mary's Hospital, and Consulting Surgeon to the St. George's and 
St. James's General Dispensary 159 
IX. On the Impregnation of the Ovum in the Amphibia. {First Series.) By George 
Newport, F.R.S., F.L.S. 8fc 169 
X. A Mathematical Theory of Magnetism. By William Thomson, Esq., M.A., 
F.R.S.E., Fellow of St. Peter's College, Cambridge, and Professor of Natural 
Philosophy in the University of Glasgow. Communicated by Lieut. -Colonel 
Sabine, R.A., For. Sec. R.S. 243 
XI. A Mathematical Theory of Magnetism. — Continuation of Parti. By William 
Thomson, Esq., M.A., F.R.S.E., Fellow of St. Peter's College, Cambridge, and 
Professor of Natural Philosophy in the University of Glasgow. Communicated 
by Lieut. -Colonel Sabine, R.A., For. Sec. R.S 269 
XII. Magnetic Survey of the Eastern Archipelago. By Captain C. M. Elliot, of 
the Madras Engineers. Communicated by Lieut. -Col. Sabine, U.P. Treas. 
R.S. 8fc 287 
