JAMES SWIFT & SON I™ 



Makers of the Highest Grade 



MICROSCOPES and ACCESSORIES 



Contractors to all Scientific Departments of H.M. Government. 



ILLUSTRATED DESCRIPTIVE CATALOGUES 



OF 



Petrological Microscopes 



giving specifications of various models, 



AND 



Petrological Accessories 



and Instruments for Mineralogy and Crystal- 

 lography, including Ketractometers, Gonio- 

 meters, Recording Micrometers, etc., 



will be sent post free on request. 



University Optical Works 

 81 TOTTENHAM COURT ROAD, LONDON, W.I. 



Publications to be had of the Geological Society, 

 Burlington House. 



QUARTERLY JOURNAL (Vols. Ill to LXXVIII, inclusive). Price to 

 Fellows, .£1 Os. Od. each : £1 5s. Od. in cloth. [Postage extra.] Separate parts (2, 5, 

 7, 9, 55, & 273 are out of print) 7s. 6d. each : price to Fellows 5s. [Postage extra.] 



GENERAL INDEX TO THE FIRST FIFTY VOLUMES OF TEE 

 QUARTERLY JOURNAL (1845-1894). Part I (A-La). Part II (La-Z). 

 Prioe 7s. 6d. each. To Fellows 5s. each. [Postage 4d. each.] 



GEOLOGICAL LITERATURE added to the Geological Society's Library 

 during the years ended December 31st, 1894-1914 and 1920-22. Prioe 5*. each. 

 To Fellows, 3s. 9ri. each. Also Geological Literature for the years 1915-19. 

 Price 10s. To Fellows 7s. 6d. [Postage Qd.] (Nos. 8, 14, & 17 are out of print.) 



THE HISTORY OF THE GEOLOGICAL SOCIETY OF LONDON . 



by H. B. Woodward, F.E.S. Price 3s. net. [Postage Is.] 



THE CENTENARY OF THE GEOLOGICAL SOCIETY OF 

 LONDON, recorded by W. W. Watts, F.R.S. Price 2s. [Postage 5d.] 



HUTTON'S 'THEORY OF THE EARTH,' Vol. Ill, edited by Sir 

 Archibald Geikie, D.C.L., F.E.S Price 3s. 6d. To Fellows, 2s. [Postage 9d.] 



THE GEOLOGY OF NEW ZEALAND. Translated by Dr. C. E. 

 Fischer from the works of MM. Hochstettee & Petermann. With an Atlae of 

 Six Maps. Price 10s. net. [Postage 9d.] 



