146 Royal Society. 
highest authority (particularly of the present day) for corrobo- 
rating facts, as it is hoped, deducibie in support of this hypo- 
thesis. By a modern Chemist. 
Mr. Westgarth Forster is preparing by subscription (price 
15s.) a second improved and greatly enlarged Edition of his 
Treatise on a Section of the Strata commencing near Newcastle- 
upon Tyne, and concluding on the West Side of the Mountain of 
Cross-Fell; with Remarks on Mineral Veins in general; also 
Tables of the Strata in Yorkshire and Derbyshire. To which 
is added a Treatise on the discovery, the opening, and the 
working of Lead Mines; with the dressing and smelting of Lead 
Ores. Illustrated with several additional Plates. 
A History and Description of Lichfield Cathedral, illustrated 
with sixteen engravings from drawings by Mr. Mackenzie; among 
which is one representing Mr. Chantrey’s famed monument re- 
presenting the two children of Mrs. Robinson. This work will 
form a portion of the aithor’s Cathedral Antiquities of England. 
By Mr. Britton. 
A Series of Engravings representing the Bones of the Human 
Skeleton, with the Skeletons of some of the Lower Animals, By 
Edward Mitchell, engraver, Edinburgh; with explanatory re- 
ferences by John Barclay, M.D. . 
Mr. Wm. Scoresby junior has in the press a work entitled 
“A Survey of the Arctic Regions.” 
XXIV. Proceedings of Learned Societies. 
ROYAL SOCIETY. 
Jan. wiv Paper by Sir E. Home on the Corpora Lutea was 
read. The ovarium is previous to puberty loose and open in its 
texture ; afterwards the Corpora Lutea make their appearance, 
forming in the cow a mass of convolutions which the author com- 
pares to those of the brain. The ova are then formed in the lutea 
hefore and independently of sexual intercourse ; but, in the au- 
thor’s opinion, impregnation is necessary to their expulsion, on 
which the Corpora Lutea are burst by extrayasated blood, their’ 
cavities after the escape of the ova being always found distended 
with coagulated blood. 
Jan. 28. A paper by Captain Webb was read, containing an ac- 
count of an extensive Trigonometrical Survey made in India by 
means of astronomical observations. Another paper was read, 
communicated by the President from Professor Aldini, stating the 
progress which had been made in the adoption of the art of lighting 
‘ by 
ee 
