JAMES SWIFT & SON, | 
Manufacturers of Optical and Scientific Instruments, 
Contractors to all Scientific Departments of H.M. 
Home and Colonial and many Foreign Governments. 
GrandsPrix, Diplomas of Honour, and Gold Medals at London, Paris, Brussels, etc. 
MICROSCOPES 
AND OTHER 
INSTRUMENTS FOR 
ALL BRANCHES OF 
GEOLOGY, . 
MINERALOGY, 
PETROLOGY. 
Sole Makers of the 
‘DICK’? MINERALOGICAL MICROSCOPES. 
Dr. A. HUTCGHINSON’S UNIVERSAL 
CONIOMETER. 
UNIVERSITY OPTICAL WORKS, 
81 TOTTENHAM COURT ROAD, LONDON. 
2 vols. 4to. With 28 plates and 187 illustrations in the text, and 
accompanied 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 
Peles different Countries. 
EDITED BY THE GENERAL SECRETARY OF THE CONGRESS. 
Ato. 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 Stockholm, 1910. 
DULAU & CO., Litd., 37 Soho Square, London, W. 
SSS ee eee 
