JAMES SWIFT & SON, 



Manufacturers of Optical and Scientific Instruments, 



Contractors to all Scientific Departments of H.M. Home 

 and Colonial and many Foreign Governments. 



Grands Prix, Diplomas of Honour, and Cold 

 Medals at London, Paris, Brussels, etc. 



MICROSCOPES 



AND OTHER 



INSTRUMENTS FOR 



ALL BRANCHES OF 



GEOLOGY, 

 MINERALOGY, 

 PETROLOGY. 



Sole Makers of the 



" DICK " MINERALOCICAL 



MICROSCOPES. 



Dr. A. HUTCHINSON'S 



UNIVERSAL GONIOMETER. 



University Optical Works, 



81 TOTTENHAM COURT ROAD, 



LONDON. 



PRICE 15s. NET. 



IN TWO SHEETS. 



A GEOLOGICAL MAP OF THE CAUCASUS 



(WITH EXPLANATORY TEXT). 



Compiled from the latest sources by Felix Oswald, D.Sc, F.G.S. 



Scale 1 : 1,000,000 (15*78 miles = 1 inch). The geological formations and 

 the igneous rocks are clearly displayed in twenty different colours. The 

 glaciers are also indicated. All heights are given in English feet, and the latest 

 railways have been inserted. The pamphlet of explanatory text gives a brief 

 account of the main physical divisions of the Caucasus, followed by a detailed 

 description of the successive geological horizons with their characteristic fossils. 

 Special care has been taken to indicate the exact position in the geological 

 series at which petroleum occurs in the Caucasian oil-fields. 



" It is produced in a bold style, somewhat like that of No^'s Map of the 

 Alps, and embodies a good deal of personal study by the author. This work 

 will be of service to many travellers, now that the district is so accessible 

 through Constantinople or Odessa, and it will be of much help to readers of 

 Suess's description of the range." — Nature (August 30, 1914). 



DULAU & CO., Ltd., 37 Soho Square, London, W. 



