Royal Society. — Astronomical Society. 225 



the History of England from the earliest Period of the Norman 

 Conquest.' Bv Sharon Turner, F. A. S. The third edition, cor- 

 rected and improved. In 3 vols. Svo. 



An Essav on Croup ;. illustrating a new and successful Mode 

 of treating that Disease. By Mr. Asbury, Surgeon, Enfield. 



An Inquiry into the Nature and Medical Treatment of Dis- 

 eases coimected with a deranged Action of the Urinary Organs, 

 particularly Gravel and Calculus. By Dr. Prout. 



Dr. Barrow's Inquiry respecting the Origin of Tubercles and 

 Tumours. In 4to. with illustrative Engravings. 



XXXIV. Proceedings of Learned Societies. 



ROYAL SOCIETY. 



Feb. 17. V>'ONCi,UDED reading of paper On some new Com- 

 binations of Platina, by Edmund Davy, Esq. 



24. Read a paper On the Methods of cutting Rock Crystal 

 for Micrometers, by Dr. William Hyde Wollaston. 



March 9. Read a paper On a new Principle of constructing 

 Ships in the Mercantile Navy, by Sir Robert Seppings; also an- 

 other On a Peculiarity in the Structure of the Eye of the Balaena 

 Mysticetus, by J. A. Ransome, Esq. 



IG. A paper was read On the Law of the Variation of the 

 Flexibility of the Canadian Fir, by M. Charles Dupin. 



ASTRONOMICAL SOCIETY. 



The first meeting of this Society was held on the 10th instant, 

 at the house of the Geological Society, Bedford-street, Covent 

 Garden; and was- very numerously attended. A paper, by the 

 Rev. Dr; Pearson, was read on the subject of a new Micrometer, 

 which he has invented for measuring small distances in the field 

 of a telescope. It is founded on the doubly refracting property 

 of rock-crystal, and promises to be a great acquisition to astro- 

 nomical instruments,. Several valuable works on the subject of 

 astronomy were presented to the Society, as the foundation of a 

 Library : and many new members were proposed. 



Officers for 1820. 



President. — His Grace the Duke of Somerset, F.R.S. & S.A. 



Fice-Presidents. 



H. T. Colebrooke, Esq. F.R.S. 



&: L.S. 

 S. Groombridge, Esq. F.R.S. 



Vol. r)."). No. 2(i;{. /V/flrr/A IS'^0. P Trea- 



SirWm.Herschel,LL,D. F.R.S. 

 J. Pond, Esq. Jsi. Roy. F.R.S. 



