58 Scientific Intelligence, 



6. Iowa Geological Survey, Annual Report, 1916. Pp. 568, 

 12 pis., 92 text figs. — This much belated annual report, received 

 in May, 1921, presents the director's administrative work and the 

 mineral production of the state for 1916; also the detailed 

 geology of Ringgold, Taylor, Clarke, Cass, and Adair counties, 

 by Melvin T. Arey, John L. Tilton, and James E. Gow, and a 

 short paper on the bowlders of the Kansan drift, by Professor 

 Kay. The most interesting part of the volume for the general geol- 

 ogist, however, is that by W. H. Norton on the brecciated nature 

 of the basal Upper Devonian (pp. 357-547). This condition of 

 the deposits is said to cover an area of about 1,000 square miles. 

 Norton's conclusion is that the Wapsipinicon formation, through 

 lateral tectonic pressure, was thrown into low troughs and arches, 

 resulting in more or less of brecciation. The movement is said to 

 have occurred not earlier than the subsequent Upper Devonian 

 formation, the Cedar Valley limestone. c. s. 



7. Ninth Biennial Report of the Commissioners of the Con- 

 necticut Geological Survey; Herbert E. Gregory, Superin- 

 tendent. 1919-1920. Bulletin No. 32, pp. 18. Hartford, 1920. 

 — Thirty-two bulletins are included in the series already issued 

 (see this Journal, 1, 286, March, 1921). Of these No. 2, on the 

 Protozoa of the fresh waters of Connecticut, by W. H. Conn; 

 No. 6, Manual of the Geology of the State, by W. N. Rice and 

 H. E. Gregory, are both out of print and should be reprinted. 

 No. 7, Preliminary Geological Map of Connecticut, by H. E. 

 Gregory and H. H. Robinson, is nearly exhausted. 



Two papers nearly ready for publication are mentioned, viz. : 

 Geology of the Stonington- Westerly region, by Laura Hatch ; 

 Geology of the Guilford Quadrangle, by Wilbur G. Foye. 



Also (but not quite so complete) are the following: Hemip- 

 tera of Connecticut, W. E. Britton in charge; Decapods of Con- 

 necticut by A. E. Verrill; Vegetation of Connecticut by G. E. 

 Nichols. 



The plans for the future are also presented in detail. In this 

 connection it should be stated that the place of Professor Greg- 

 ory (now in Honolulu) has been taken by Dr. H. HoUister 

 Robinson. 



8. The Tin Resources of the British Empire; N. M. Penzer. 

 Pp. 358, London, 1921 (William Rider and Son). Illustrated 

 by numerous maps and photographs of tin deposits. — This is the 

 second volume of a series devoted to a description of the raw 

 materials of industry. As the British Empire produces two- 

 thirds of the total output of tin of the world, the present volume 

 contains a description of the large majority of the important 

 deposits and forms a most useful handbook on the subject. The 

 deposits of Bolivia are the only large producers that are not 

 included. A large portion of the book is devoted to the descrip- 

 tion of the tin districts in Cornwall, the Malay States, India and 



