YORKSHIRE NATURALISTS’ UNION, 
VERTEBRATE SECTION. 
President of the Section : Rosse Butterfield, Keighley. 
Two meetings will be held in the Library of the Church Institute, Albion 
Street, Leeds, on Saturday, February 18th, 1933, at 3-15 p.m. and 6-30 p.m. 
The following papers will be read : 
‘ Human Influence on changing Vertebrate Fauna,’ by Rosse 
Butterfield . 
‘ The Great Crested Grebe Census and Enquiry of 1931 : The Yorkshire 
Area,’ by H. B. Booth, F.Z.S., M.B.O.U. 
‘ Recent Birdwork in Lapland and in the English and Dutch Marshes 
(illustrated), by R. Chislett, F.R.P.S., M.B.O.U. 
‘ A Duncombe Park Avian Quartet ’ (illustrated), by F. Jefferson. 
Members are invited to bring notes, specimens, and lantern slides. 
Will officials of affiliated societies kindly notify their members. 
E. WILFRED TAYLOR, Hon. Secretary, 
13 Chestnut Avenue, York. 
FOR SALE. 
GEOLOGY. 
At 1/- each. 
Rudimentary Treatise on Geology. Lieut. -Col. Portlock. 
The Religion of Geology and its Connected Sciences. E. Hitchcock. 
Our World : Its Rocks and Fossils. Mrs. Wright. 
The Geologist's Text-book. D. T. Ansted. 
Geology. S. B. J. Skertchly. 
At 1/6 each. 
Corals and Coral Islands. J. D. Dana. 
Physical Geography. T. S. Traill. 
Geology : Chapters of Earth History. George Hickling. 
Elementary Practical Physiography. J. Thornton 
At 8/6 
The Primaeval World of Switzerland (2 Vol.). Prof. Heer. 
At 9/6 
Geology and Mineralogy Considered with Reference to Natural The- 
ology (2 Vols. in one). Many plates on linen. Wm. Buckland. 
At 10/6 each. 
Royal Commission on Coal Supplies, 1905, Vol. I., Digest of Evidence. 
At 12/6. 
A Treatise on Ore and Stone Mining. C. Le Neve Foster. 
At 15/- 
Annals of Coal Mining and the Coal Trade (2 Vols.). R. L. Galloway 
At 17/6. 
Geology and Fossils of Sussex (Large Paper). 
Apply : — C Department, Messrs. A. Brown & Sons, Ltd. 
