Miscellaneous Intelligence. 321 



reaching the conclusion that North German, Danish and Swedish 

 fossil drift-wood has not been derived from the Halma-Sandstone 

 (Cretaceous) in S. Sweden but that the great majority of it has 

 had its origin in Tertiary deposits at no great distance ; 



9. Swedish lower Paleozoic Hyolithes and Contdariw. Sveriges 

 Kambrisk-Siluriska Hyolithidm och Conulariedce, af Gerhard 

 Holm, from the afbandlingar of the Sveriges geologiska under- 

 sokuing, Ser. C, No 112, pp. 1-172 and 6 quarto plates. Stock- 

 holm, 1892. — Gerhard Holm has given, in this monograph on the 

 interesting and little known extinct organisms of Sweden an 

 exhaustive list of the known species classified and tabulated ac- 

 cording to their range, distribution and supposed genetic affini- 

 ties. 41 new species of the Hyolithiidse, 10 new Conulariidse and 

 one new species of the Torellellidae are described. An English 

 summary of characters and classification is given at the close of 

 the volume. 



III. Miscellaneous Scientific Intelligence. 



1. British Association for the Advancement of Science. — The 

 sixty-fourth meeting of the British Association will be held in 

 Oxford, under the Presidency of the Marquis of Salisbury, Chan- 

 cellor of the University, in the week beginning August 8th, 1S94. 



2. A History of Mathematics ; by Florian Cajori. — Macmil- 

 lan and Co., New York, 1894. 8°, pp. xiv, 422.— The first third of 

 Professor Cajori's book is devoted to the history of methematics 

 among the Babylonians, Egyptians, Greeks (including the Alex- 

 andrian schools), Romans, Hindoos, Arabs, and Europe during 

 the Middle Ages. The second third traces the development of 

 the science from the beginning of the sixteenth to the early part 

 of the nineteenth century. The recent developments of the sci- 

 ence are then treated in several lines, Synthetic Geometry, 

 Analytic Geometry, Algebra, Analysis, Theory of Functions, 

 Theory of Numbers, and Applied Mathematics. The volume 

 has an exceedingly convenient index filling seventeen pages. 



No science can be thoroughly comprehended until its history 

 has been learned. Professor Cajori has given the history of 

 Mathematics in an interesting form, and teachers and students 

 of the science have reason to thank him for it. h. a. n. 



3. The Ejected Blocks of Monte Somma, — Part I, Stratified 

 Limestones ; by H. J. Johnston-Lavis. — The following extract 

 from the article of above title in the Transactions of the Edin- 

 burgh Geological Society (vol. vi, 1893, pp. 347-350), contains 

 the interesting conclusions reached by the author from study of a 

 large number of specimens : 



" Such are the specimens of stratified limestones which are to 

 serve as clues to the remarkable series of reactions that have con- 

 verted cretaceous limestones into a series of rocks that, by them- 

 selves, one would hardly dare to suppose once to have been 

 nothing more than an impure dolomitic limestone. I do not 



