494 ' Scientific Intelligence. 



Science in the University of London. 138 pp. 8vo. London, 

 1889. (Longmans, Green & Co.). — Treats especially of the origin 

 of the Archaean rocks under pre-Archsean and Archaean condi- 

 tions, the author being incredulous as to later or ordinary regional 

 metamorphism. 



5. Eudialyte (?) from an Arkansas locality. Preliminary 

 notice by W. E. Hidden and J. B. Mackintosh. (Communicated.) 

 We are indebted to Mr. Wm. Niven of New York, for a very 

 characteristic specimen of this rare species which he found during 

 the past summer in the vicinity of Magnet Cove, Arkansas. It 

 occurs in nodular form in a very tough matrix of feldspar and 

 hornblende, with which some titanite is also associated. The 

 masses are of a fine rose-red color and, excepting as they are 

 flawed and cracked, are perfectly transparent. Sp. G. = 2*893. 

 H=5- + (scratched by scapolite). It is easily soluble in HC1, 

 leaving gelatinous silica. The solution shows with turmeric 

 paper the usual zirconia reaction. The presence of soda, lime, 

 oxide of iron and zirconia were also proved by qualitative anal- 

 ysis on half a gram of material. The mineral, as thus far seen, 

 has a yellowish border (which may be due to alteration) and con- 

 tains small cavities in which are implanted minute dull greenish 

 crystals of an unrecognizable mineral. Until a quantitative 

 analysis has been made, we think that the above data warrants us 

 in referring this mineral to eudialyte, and more especially since 

 Shepard* credited this locality, long ago, with having produced 

 this species. 



6. Catalogue of Minerals and Synonyms alphabetically ar- 

 ranged for the use of Museums / by T. Egleston, Ph.D. 198 

 pp. Washington, 1889 (Bulletin U. S. National Museum, No. 

 33). — The author has industriously brought together a large 

 number of mineral names and synonyms from many sources, and 

 although no critical treatment of them is attempted, collectors 

 will find the work very useful. 



7. Materialien zur Miner alogie Musslands, von N. von Kok- 

 scharow, vol. x, pp. 97-224. St. Petersburg, 1889. — Mineralogists 

 will welcome this last addition to the mineralogy of Russia, both 

 for what it contains and, too, as a proof that the veteran author 

 is still carrying on his work with vigor. The species chiefly 

 discussed are euclase, herderite and sylvanite. 



8. Index der Krystallformen der Mineralien ; von Dr. Victor 

 Goldschmidt, Zweiter Band, Heft 5. — This recently issued part 

 of Goldschmidt's great work includes the species from lanarkite 

 to lunnite. 



9. Einleitung in die Chemische Krystallographie y von Dr. A. 

 Fock. 126 pp. 8vo, Leipzig, 1888 (Wm. Engelmann). — The sub- 

 ject of crystallography is usually treated almost exclusively 

 as a geometrical subject ; at the same time there have not 

 been wanting discussions of a broader range and of late years 

 much progress has been made in connecting form and chemical 



* Dana, Syst. Min., p. 249. 



