Royal' Society. 4^3 



By eoUocting together ihe ditferent results given above, they will- 

 stand as follows : 



M. s. 

 Oct. 25th. 1st Set Obs. O 37 W. 

 2 Do. O 12,6 W. 



Oct. 27th. 1st Set Do. 42 W. 



2 Do. _J 4_ W. 



4) 2^35,6 

 Mean from Green-ftEh 38,9 ^^• 



Hence the Longitude derived from the above observa- 

 tions comes out 38,9 s- i" ti'iie West of Greenwich, or 

 equal to 9' 31,33" in space. The reason for giving the 

 calculations at full length has been merely to show their 

 simplicity; and should ihey tend to induce other persons 

 interested in the determination of this useful problem to 

 repeat then), the author's intentions will be answered. His 

 object has been in this instance d.rected only to an endea- 

 vour to fc^cilitate the acquirement of the method of deter- 

 mining the Longitude by a means both simple and certain. 



SomersTown, Der. 27, 1812. 



LXXIX. Proceedings of Learned Societies, 



ROYAL SOCIETY. 





Nov. 26. 1 HF. Croonian Lecture, by Dr. Wollaston, was 

 read. It was an unusually brief lecture, and treated only 

 on the integral molecules of crystals. Dr. W., improving 

 an ingenious speculation of Dr. Hooke, assumed the prjn- 

 ciple,"ihat the original molecules of matter are globular ; 

 and with these globes, he very satisfactorily showed how 

 many of the primitive forms of crystals might arise from 

 their disposition. He acknowledged that the assumption 

 was perfectly gratuitous j but alleged, that at present there 

 is no other mode of accounting for the Ictrahedral and other 

 forms of crystals. 



Saturday fhe 30lh November, being St. Andrew's day, 

 the fioval Society held their annual meeting, at their apart- 

 nienls in Somerset Place, for the choice of a Council and 

 OtHccrs f'lr the year eiiauipg, when the following gentlemen 

 were elected : 



Of the old Council : — The right hon. Sir Joseph Banks, 

 Bart. K. B. ; Sir Charles Blagden, Kut.; Sanmel Good- 

 enough, Lord Bisho|) of Carlisle ; Anthony Carlisle, Esq. ; 

 Sir Humphry Daw, Knt.; Samuel Lyjons, Esq. ; Joseph 

 Ff3 ' tie 



