394 Scientific Intelligence. 



stated. la justice to the experimenters, Messrs. Irvine and 

 Woodhead, to whom also sincere apology is- due, and at Mr. 

 Daly's request, the following correction is here made. On page 

 102, line 19, the words "lime salts " should read "calcium carbo- 

 nate." In the second line following, the expression " calcium 

 sulphate" should be inserted before the word "and." The 

 proper meaning of the context will be discerned after this correc- 

 tion is made. 



6. Samples of the Sea-floor along the Coast of East Green- 

 land, 74|— 70 JV. L. ; by O. B. Boggild. Mineralogical and Geo- 

 logical Museum of the Universit} 7 , Copenhagen. Contributions 

 to Mineralogy, No. 3. Pp. 95, pis. 9. — This paper is a study of 

 the character of 41 samples taken approximately along the 100 

 fathom line off the east coast of Greenland above latitude 70° N. 

 A geological map of the coast from Nathorst is given between 

 these latitude limits showing areas of Archean, sedimentary and 

 volcanic rocks but without giving any ages for the latter two 

 groups. These sea-floor deposits give a clue as to the lithologi- 

 cal nature of the land formations. j. b. 



7. Mikroseopische Physior/raphie der Massiqen Gesteine ; von 

 H. Kosenbusch. Erste Halfte, Tiefengesteine, Ganggesteine, 

 4te Aufl. 1907, pp. 7 16 ; 8°. — In this, the fourth edition of this 

 well-known handbook, whose first edition dates back to 1877, the 

 old material has been thoroughly worked over and a vast amount 

 of new added. The use of a somewhat larger page and a thin, 

 tough paper will make the completed volume presumably no more 

 bulky than before, in spite of probably fifty per cent of added 

 matter. In essence, so far as the development of classification 

 and the treatment of the subject from the theoretical standpoint 

 is concerned, there is little that is new, the work agreeing with 

 the ideas enunciated in the last edition. A constant tendency, 

 however, may be noticed to treat the classification of rocks more 

 strongly from the genetic point of view. An instance of this 

 may be seen in the charnockite-mangerite-anorthosite series, which 

 is, so to speak, rather suggested than actually installed. 



The author states, in reference to the series, that it parallels the 

 lime-alkali-granite, syenite, gabbro and the alkali-granite, alkali- 

 syenite, nephelite-syenite, essexite-shonkite, etc., series ; that it 

 is chemically characterized by the striking retreat of iron and 

 magnesia (leaving, of course, lime and alkalies), and mineralog- 

 ically by the predominance of a peculiar microperthite, of pyrox- 

 enes rather than hornblende or mica, as well as by the extension 

 of orthoclase and quartz into the very basic forms. Charnockite, 

 it may be recalled, is the hypersthene granite from India of 

 Holland, while mangerite is the name given by the author to 

 rocks composed chiefly of microperthite associated with the anoi'- 

 thosites of Norway and termed monzonite, etc., by Kolderup. 



If the idea involved in the erection of this new series takes root 

 and flourishes, it will be of interest in the future to see the growth 

 of the new cian-of dike rocks that will inevitably arise. Here 



