UNIVERSITY OF LONDON. 
A Course of Four Public Lectures on “ Cosmogony and 
Stellar Evolution” will be given by Mr. J. H. Jeans, M.A., 
F.R.S. (Secretary of the Royal Society), at King’s College, 
Strand, W.C. 2, on Tuesdays, May 38, 10, 17, and 24, at 5 p.m. 
These Lectures, which will be illustrated with lantern slides, will 
give an account of recent observational and theoretical research 
and be given in non-technical form so as to be intelligible not only 
to Astronomers, Mathematicians, and Geologists, but also to all 
acquainted with simple scientific terminology. Syllabus obtainable 
on application to the undersigned. The Chair at the first Lecture 
will be taken by Professor J. W. Nicholson, F'.R.S. (Professor of 
Mathematics in the University). Admission free. 
Epwin Drier, Academic Registrar. 
UNIVERSITY OF LONDON. 
The Senate invite applications for the University Readership 
in Geology, tenable at Bedford College.. Salary £600 a year. 
Applications (12 copies) must be received not later than first 
post on May 21, 1921, by the Academic Registrar, University 
of London, South Kensington, S.W. 7, from whom further 
particulars may be obtained. 
Palzontographical Society. 
VOL. LXXII (for 1918). 4to. Boards or wrappers. £1 5s. 
CONTENTS. 
1. The Pliocene Mollusca. Vol. ii, part i. By F. W. HARMER. 
With 8 plates. 
2. The Ordovician and Silurian Bellerophontacea. Part i. By 
Dr. F. R. COWPER REED. With 8 plates. 
London: 
DULAU & CO., Ltd., 34-36 Margaret Street, Cavendish Square, W. 1. 
