Notes and Comments. 
On 
Un 
LEEDS GEOLOGISTS. 
Under the editorship of Mr. E. Hawkesworth, part XVII. of 
the Transactions of the Leeds Geological Association has 
appeared, for IgII-13 (50 pp., 2/-). Besides reports of the 
Society's excursions and meetings, there are papers on 
“ Petrological Characteristics of Underclays,’ by Miss S. E. 
Chapman ; ‘The Ammonites of the Lias (abstract),’ by Mr. 
C. Thompson ; and ‘ Evidences of Climatic Changes in Geo- 
logical Times ’ (abstract), by Prof. P. F. Kendall. Messrs. A. 
Burnett and J. H. Everett give some detailed ‘ Notes on Sections 
Robin Hood Quarry, looking east, showing Haigh Moor Coal. 
in a Quarry at Robin Hood, near Leeds,’ illustrated by photo- 
graphs and diagrams. One of these we are kindly permitted 
to reproduce. The Leeds Society is to be congratulated on 
the valuable nature of its publication. 
LEEDS ASTRONOMERS. 
No. 21 of the Journal and Transactions of the Leeds 
Astronomical Society, edited by C. T. Whitmell (106 pp., 2/-), 
has been published. It contains some interesting notes by 
the Editor ; some notes on ‘ Leap Year,’ by S. Thorp; ‘ The 
Spectroscope,’ by P. McC. Wilson ; ‘ Telescopic Aperture and 
Light Grasp,’ and ‘ The Closing of the Mouth of the Reflect- 
ing Telescope,’ by D. Booth; ‘The History of Astronomy,’ 
1915 Feb, 1. 
