JAMES SWIFT & SON, 
Manufacturers of Optical and Scientific Instruments, 
Contractors to all Scientific Departments of H.M. Home 
and Colonial and many Foreign Governments. 
Crands Prix, Diplomas of Honour, and Gold 
Medals at London, Paris, Brussels, ete. 
MICROSCOPES 
AND OTHER 
INSTRUMENTS FOR 
ALL BRANCHES OF 
GEOLOGY, 
MINERALOGY, 
PETROLOGY. 
Sole Makers of the 
““DICK’? MINERALOGICAL 
MICROSCOPES. 
Dr. A. HUTCHINSON’S 
UNIVERSAL CGONIOMETER. 
University Optical Works, 
81 TOTTENHAM COURT ROAD, 
LONDON. 
2 vols, 4to. With 28 plates and 137 illustrations in the text, and 
accompamed by a folio Atlas of 42 maps. Price £3 net. 
THE IRON ORE RESOURCES OF THE 
“WORLD. 
A Summary compiled upon the initiative of the Executive Committee 
of the Eleventh International’ Geological Congress, Stockholm, 1910, 
with the assistance of Geological Surveys and Mining Geologists of 
different Countries. 
EDITED BY THE GENERAL SECRETARY OF THE CONGRESS. 
4to. Sewed. £1 net. 
CLIMATIC CHANGES SINCE 
THE LAST ICE AGE. 
A Collection of Papers read before the Committee of the 
Eleventh. International Geological Congress at Stockho/m, 1910. 
DULAU & CO., Ltd., 37 Soho Square, London, W. 
