JAMES SWIFT & SON Lm 



MAKERS OF THE HIGHEST GRADE 

 MICROSCOPES AND ACCESSORIES. 



Contractors to all Scientific Departments of 

 H.M. Government. 



"Advanced 

 Student." 



PETROLOGICAL 

 MICROSCOPES 



"Primex," " Advanced Student," "Petros," 

 "Survey" and "Dick" models for all classes 

 of Petrological and Mineralogical Research. 



For specifications and prices see LIST OF NEW 

 MODELS (Petro 1912) post free. 



University Optical Works 

 81 TOTTENHAM COURT ROAD, LONDON, W.l 



Publications to be had of the Geological Society, 

 Burlington House. 



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

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

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



GENERAL INDEX TO THE FIRST FIFTY VOLUMES OF THE 

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

 Price 7s. Qd. each. To Fellows 5s. each. [Postage Qd. each.] 



GEOLOGICAL LITERATURE added to the Geological Society's Library 

 during the years ended December 31st, 1894-1913 and 1920, 1921. Price 5s. each. 

 To Fellows, 3s. 9d, each. [Postage 7d.] (Nos. 8 & 14 are out of print.) 



THE HISTORY OF THE GEOLOGICAL SOCIETY OF LONDON, 



by H. B. WooDWAUD, F.R.S. Price35.net. [Postage Is.] 



THE CENTENARY OF THE GEOLOGICAL SOCIETY OP 

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



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

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



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

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

 Six Maps. Price 10s. net. [Postage dd.] 



