THE 



PROCEEDINGS 



OF 



ROYAL SOCIETY. 



1830-1831. No. 7. 



November 17, 1831. 



HIS ROYAL HIGHNESS THE DUKE OF SUSSEX, K.G., 

 President, in the Chair. 



The followingPapers were read. The first was entitled, "Researches 

 in Physical Astronomy — 6 On the Theory of the Moon.' " By J.W. 

 Lubbock, Esq. V.P. and Treasurer of the Royal Society. 



This paper is a continuation of the author's former paper on the 

 same subject, in which he gives the developments which are required 

 in the second approximation, or that in which the square of the dis- 

 turbing force is retained. 



The author has not yet attempted to obtain numerical results, but 

 he considers this method of solution equally advantageous with the 

 method hitherto adopted, and that the calculation which would tend 

 to perfect the tables of the moon is a desideratum in physical astro- 

 nomy. 



The author has obtained numerical results in the first approxima- 

 tion ; the value of the variation agrees within a few seconds with the 

 result of Newton in the third volume of the Principia. 



The next paper was entitled, "On the Tides," by the same. 



This paper contains tables of the results of observations made at 

 Brest, with regard to the principal inequality of the tides, or that 

 which is independent of the parallaxes and declinations of the moon 

 and sun, and depends solely on the moon's age, that is, on the time 

 of her passage through the plane of the meridian ; from which it ap- 

 pears that the tables of the tides for London are not applicable to 

 Brest, by merely changing the establishment, that is, by adding a con- 

 stant quantity, as has been hitherto supposed ; and the same remark 

 applies to any distant parts. 



The third paper was entitled, " On the Structure of the Human 

 Placenta and its connection with the Uterus." By Robert Lee, M.D* 

 F.R.S. Physician to the British Lying-in Hospital. 



In the year 1780 Mr. John Hunter presented a paper to the Royal 

 Society, in which he laid claim to the discovery of the true structure 

 of the placenta, and of its vascular connections with the uterus. From 



G 



