Mil S'TS. 



Number 36, 



Ptge 



\l.l\ ADOtbei Episode in the History of Niagara 



Fall w. Spi noi b 189 



\l \ Apparatus for Measuring very High Pressures; by 



\. d«F P m m i a, Jr. * 15 i 



\I.\ l Application of [odine in the Analysis of Alkalies 



:m. I Acids; bj 0. F\ \v li b i b and David H. M. Gii/- 



it ..'. 



\l.\ll. Associated Minerals of Rhodolite; by \V. E. 



Hidden and J. II. Pbati .._. 



MAIM. Re vision of the Moraines of Minnesota; by J. K. 



Todd " 169 



XLIX. Preliminary Report on Bome new marine Tertiary 



horizons discovered by Mr. J. B, Hatcher near Punta 



Arenas, Magellanes, Chile ; by A E, Obtmann 47s 



L.— Comparative Value of Different Kinds of Possils in 



Determining Geological Age; by O. C. Marsh.. 18S 



II. Families of Sauropodos Dmosauria ; by O. ('. Mabsh. i^t 

 I-!'- Biotite-tinguaite Dike from Manchester by the Sea, 



Essex County, Mass.; by A. 8. Eakle 489 



LII I.— Descriptions of new American Actinians. with critical 



Dotes on other species, I.; by A. E. Verrill 493 



[ENTIPIC [NTELLIGENCB. 



-Hyponitrous acid and Hyponitrites, Kibschneb: Ex- 

 periments with lleliuin. Tbavbbs, 199 —Calcium nitride. MoiSSAN, 500.— Sodi- 

 um anb-oxide and peroxide produced by combustion. Forcrand: Aluminum 

 nilride, Fbanck, 601.— Enantiomorphism. Kipping and Pope, 502.— Doctrine of 

 Energy; a Theory of Reality: Gravitation constant and mean density of the 

 EtlCHABZand 0. Kbigab-Menzel : Theory of the Coherer. E ASOH- 

 KINAS8, 503.— Theory of the Hall effect in an Electrolyte: Free Expansion of 

 Gases, 504. 



- I. logical History of the Tsthmus of Panama and Por- 



,|U,IS " f &■ '!'• Hill, B06.— Geology and Mineral Resources of the 



Judith Mountains of Montana, W. H. Weed and L. V. Pirsson, 508.— Fossil 



C D. Walcott: Cretaceous Foraminifera of New Jersey, R. M. 



H<.\v> of the western slope of the Sierra Nevada, Cal., F. L. 



-Bibliofrrapby and Index of North American Geology, Paleon- 



-v and Mineralogy for 1890, F. B. Weeks: Report on the Geol- 



. L. W. Bailey: Report on a traverse of the 



I the Labrador Peninsula from Richmond Gulf to Ungava Bay, 



port on the Geology of the French River Sheet, R. Bell, 510.— 



benomenea de contact, A. Lacboix: Ijrneous 



rasmania, W. H. Twelvetbbbs and W. F. Petterd: Sulphohalite. 



J. H. vant BoppandA. P. Baundebs, 511. 



-National Academy of Sciences: Studies from 



tory, E. W. Soriptdbe, 512.— Report on the 



idary Line between Alleghany and Garrett Counties, Md , 



\\ A BAUEB: of Scientific and Technical' Periodicals, 1665-1895, 



H. I BOLTON: Differential and Integral Calculus, P. A. Lambert, 513. 



Ikdex to Volume VI, 514. 



