Geology. 563 



as in Lingula. Pseudolingula (new) is therefore still closely related 

 to Obolus in its pedicle characters. He also thinks the same 

 features are present in L. lesueuri and L. rounaulti of the Silurian. 

 The reviewer has looked over his collection of Lingulas and 

 thinks that the characters of Pseudolingula may also be present 

 in L. cincinnatiensis, L. iowensis and L. lewissi. The preserva- 

 tion, however, is not good enough to determine conclusively the 

 point in question. c. s. 



13. History of the Clay -Working Industry in the United 

 States ; by Heinrich Ries and Henry Leighton. First edition. 

 First thousand. Pp. viii, 270 ; 8 plates, 3 figures. New York, 

 1909 (J. Wiley & Sons). — The senior editor of this volume pub- 

 lished, some years since, a work on the occurrence and use of clays 

 in the United States (see vol. xxiii, p. 71). The present work is 

 more comprehensive and historical and gives an account of the 

 way in which this industry, one of the earliest to be developed in 

 this country, has grown to its present magnitude. It may not be 

 appreciated that the value of clay products in 1906 attained the 

 total — a maximum thus far — of $161,000,000. Among the differ- 

 ent states Ohio has for many years occupied the first place with 

 $30,000,000 of products, and Pennsylvania the second with 

 $20,000,000 ; New Jersey, Illinois and New York come next in 

 order. This work will be found to contain many interesting 

 facts by those concerned with the subject with which it deals. 



14. Elements of Mineralogy, Crystallography and Blowpipe 

 Analysis from a practical standpoint : by Alfred J. Moses and 

 Charles Lathrop Parsons. Fourth edition, pp. 448, with 583 

 figures. New York, 1909 (D. Van Nostrand Company). — This 

 useful work, first issued in 1895, has now reached its fourth edi- 

 tion, with numerous additions and improvements. Some new 

 details have been added, and the statistics of production, which* 

 form a valuable feature, have been brought up to date. 



III. Miscellaneous Scientific Intelligence. 



1. National Academy of Sciences. — The autumn meeting of 

 the National Academy was held at Princeton, N. J., on Nov. 16- 

 18. The meeting was largely attended and the hospitality of the 

 university authorities made the occasion a memorable one. The 

 sessions were held in the new Arnold Guyot Hall and in part also 

 in the Palmer Physical Laboratory. In the latter place a lecture 

 was delivered on Tuesday afternoon by Professor W. F. Magie 

 on the Investigations of Joseph Henry illustrated by Professor 

 Henry's own apparatus. There was also an exhibition on Wed- 

 nesday illustrating recent scientific investigations in the Museum 

 of Guyot Hall. The titles of papers presented for reading are 

 given in the following list : 



A. Agassiz : On the presence of teeth in Echinoneus Van Phels. 

 W. B. Scott : The geology of South Africa. 



E. Gr. Conklin : Formative substances in eggs. The relative sizes of cells 

 and nuclei. Memoir of W. K. Brooks. 



