CONTENTS 
I. Researches in Physical Astronomy. By John William Lubbock, Esq. V.P . 
and Treas. R.S. page 1 
II. On the Tides. By John William Lubbock, Esq. V.P. and Treas. R.S. 51 
III. On the Structure of the Human Placenta, and its Connexion with the 
Uterus. By Robert Lee, M.D. F.R.S. 8$c. Physician to the British 
Lying-in- Hospital 5 7 
IV. On an inequality of long period in the motions of the Earth and V enus. 
By George Biddell Airy, A.M. F.R.A.S. F.G.S., late Fellow of Trinity 
College Cambridge, and Plumian Professor of Astronomy and Experi- 
mental Philosophy in the University of Cambridge. Communicated by 
Sir J. F. W. Herschel, F.R.S. fyc .67 
V. Experimental Researches in Electricity . By Michael Faraday, F.R.S. 
M.R.I. Corr. Mem. Royal Acad, of Sciences of Paris, Peter sburgh , 
8$c 125 
VI. The Bakerian Lecture. — Experimental Researches in Electricity . — 
Second Series. By Michael Faraday, F.R.S. M.R.I. Corr. Mem. 
Royal Acad, of Sciences of Paris, Petersburgh, fyc 163 
VII. On the Theory of the Perturbations of the Planets. By James Ivory, 
A.M. F.R.S. Instit. Reg. Sc. Paris. Corresp. et Reg. Sc. Gottin. Cor- 
resp 195 
