LIST OF BOOKS OFFERED FOR SALE 



AT THE NET PRICKS AFFIXED BY 



DULAU & CO.. LTD., 34-36 MARGARET STREET. 

 CAVENDISH SQUARE, LONDON, W. 1. 



AllBEPi (E. A. N.). Devonian Floras. A study of the origin of Cormopbyta. 



With a preface by D. H.Scott. 8vo. Illustrated. Cloth. Cambridge. 17s. 6d. 

 BEILBY (G.). Aggregation and Flow of Solids. Being the records of an 



experimental study of the Micro- Structures and Physical Properties of 



Solids in various states. 1900-1921. pp. xvi + 256. 8vo. With 34 



plates. Cloth. London, 1921. £1. 

 COX (G. H.), DAKE (C. L.), and MUILENBUKG (G. A.). Field Methods in 



Petroleum Geology, pp.305. 8vo. Illustrated. New York, 1921. £1 4s. 

 DAVIE S (A. M.). An Introduction to Palaeontology. Illustrated. 8vo. 



Cloth. 1920. 12s. 6d. 

 EMMONS (VV. H.). Geology of Petroleum, pp. 624. 8vo. Illustrated. 



New York, 1921. £1 16s. 

 GREGORY (J. W.). Nature and Origin of Fiords. With diagrams and 



illustrations. London, 1913. 8vo. Cloth. 8s. 6d. 



The Rift Valleys and Geology of East Africa. With many maps 



and illustrations, pp. 479. 8vo. Cloth. London, 1921. £1 i2s. 



HARKER(A.). Petrology for Students. Fifth edition. Crown 8vo. Cloth. 



Cambridge, 1919. 8s. 6d. 

 HAWKINS (H. L.). Invertebrate Palasontology, and Introduction to the Study 



of Fossils. 8vo. With 16 illustrations. Cloth. London, 1920. Gs. 6d. 

 HOLMES (A.). Nomenclature of Petrology, pp. 284 + viii. Crown 8vo. 



Cloth. London, 1920. 12s. 6d. net. 



Petrographic Methods and Calculations, with some Examples 



of Results Achieved, pp.xx + 516. 8vo. Cloth. London, 1921. £1 lis. 6d. 



JUKES-BROWNE (A. J,). The Hills and Valleys of Torquay: a Study in 



Valley Development and an explanation of Local Scenery. 1907. 



Seven maps and diagrams. 8vo. Cloth. 2s. &d. net. 

 KRAUS (E. H.) AND HUNT (W. F.). Mineralogy: an introduction to the 



study of Minerals and Crystals, pp. xiv + 561. 8vo. Cloth. New 



York, 1920. £1 7s. 

 LAKE (P.) AND RASTALL (R. H.). Text-book of Geology. Third edition. 



London, 1920. 8vo. Cloth. £1 Is. 

 LEITH (C. K.). The Economic Aspect of Geology, pp. xiii + 457. 8vo. 



Cloth. New York, 1921. £1 10s. 



and MEAD (W. J.)- Metamorphic Geology. A Textbook. 8vo. 



Illustrated. Cloth. New York, 1915. £1. 



REED (F.R. C). The Geology of the British Empire, pp. 480. 8vo. With 

 12 folding maps and 13 maps and sections in the text. Cloth. London, 

 1921. £2. 



RUTLEY (F.). Elements of Mineralogy. 20th ed. Revised with an intro- 

 duction by G. T. HoUoway. pp. xxii-f 394. Cr. 8vo. Illustrated. Cloth. 6s. 



TEALL (J. J. Harris), M.A., F.G.S. British Petrography: with special 

 reference to the Igneous Rocks. With 47 plates. Royal 8vo. Cloth. 

 £3 3s. net. 



PALiEONTOGRAPHICAL SOCIETY— Vol. LXXIII. 



CONTAINING 



1.— The Pliocene Mollusca. Vol. II, Part II. By Mr. F. W. Hakmer. 



Four plates. 

 2. — The Ordovician and Silurian Bellerophontacea. Part II. With 



Title-page and Index. By Dr. F. R. Cowper Reed. Five plates. 

 3.— The Carboniferous Insects. Part I. By Mr. Herbert Bolton. 



Four plates. 



London, 1921. 4to boards or separate parts. £1 5s. net. 



