Properties of the Garnet Group. 35 



18 



19 



20 



21 



22 



23 



1-8132* 



1-8200* 



1-8384 



1-8645*|| 



1 -8878 



1-8884 



4-135* 





3-418 



3-781 



3-660 



3-801 



37-58 



37-06 



37-11 



34-53 



36-79 



35-37 



21-58 



21-96 



5-88 



6-05 



1-39 



1-54 







22-54 







1-32 









25-10 



29-30 



28-89 



36-69 



20-05 



2-44 



0-84 



0-69 



0-52 





20-41 





tr. 



0-26 



0-34 



1-89 



0-08 



30-34 



33-67 



31-40 



32-26 



2-31 



tr. 



1-10 





0-77 



21 



17 

 Index of refraction 1 -8105 



Specific gravity 4'273 



SiOj.--. -- 36-16 



A1 2 3 19-76 



Cr 2 3 .-- 



Fe 2 3 



FeO 11-10 



MnO ..:._ 32-18 



CaO 0-58 



MgO 0-22 



100-00 100-05 99-56 99-41 100-19 10060 100-45 



* Determination made by Author. 



f Composed of Alk. - 48 and Ign. 0-44. 



% Determined on material presented by Dr. Geo. F. Knnz. 



S Original anal, gives Na a O, 0'42 ; Ign., 0"74; Total, 100-35. 



I Determined on material presented by Prof. L. Colomba. 



1. Grossularite, Xalostoe, Mexico ; Seebach, Inaug. Diss. , Heidelberg, 1906 ; 



Centralbl. Min.. 774, 1906. 



2. Pyrope, Kimberley ; Fischer, N. Jb. Min., i, 393, ref., 1890; Index of 



refraction by Wiilfing, Mikroskopische Physiographie der petro- 

 granhiseh wichtigen Mineralien by H. Rosenbnsch and E. A. Wiilfing, 

 p. 18, 1905. 



3. Pyrope, Colorado River, Arizona ; Seebach, loc. cit. 



4. Grossularite, Wakefield, Ottawa Co., Quebec, Canada; Bullman, this 



Journal, xxvii, 306, 1884; Wiilfing, loc. cit. 



5. Pyrope, Kimberley. S. Africa; Fischer, loc. cit.; Wulfing, loc. cit. 



6. Rhodolite, Mason Branch, Cowee Creek, Macon Co., N. C. ; Pratt, this 



Journal, v, 294, 1898. 



7. Hessonite, Ala, Piedmont; Jannasch, N. Jb. Min., i, 120, 1883; Wiilf- 



ing, loc. cit. 



8. Almandite, Ceylon; Seebach, loc. cit. 



9. Almandite, Jeypoor ; Seebach, loc. cit. 



10. Spessartite, Nathrop, Colo. ; Eakins, this Journal, xxxi, 435, 1886. 



11. Spessartite, Tsilaisina, Madagascar; Duparc, Wunder and Sabot, Les 



Mineraux des Pegmatites des Environs D'Antsirabe a Madagascar, 

 404, 1910. 



12. Spessartite, Amelia Co., Va.; Clarke, U. S. G. S. Bull. 60, 129, 1890. 



13. Almandite, Fort Wrangel, Alaska ; Kountze, Dana's System of Min- 



eralogy, 6th Ed., 442, 1892. 



14. Spessartite, Brancbville, Conn. ; Penfield, Dana's Sys. Min., 6th Ed., 



442, 1892. 



15. Almandite, Salida, Colo.; Penfield and Sperry, this Journal, xxxii, 310, 



1886. 



16. Almandite, Wittiehen ; Hebenstreit, Zs. Ex., ii, 104, 1878; Wulfing, 



loc. cit. 



17. Spessartite, Haddam, Conn.; Rammelsberg, Jour. pr. Chem., lv, 487, 



1852: Wulfing, loc. cit, 



18. Almandite, Redding, Conn.; F. L. Sperry, unpublished analysis from 



records of Brush Mineral Collection. 



19. Spessartite, Pala, San Diego, CaL; Schaller. Published by permission 



of the Director of the TJ. S. Geological Survey. 



20. Uvarovite, Bissersk, Ural Mts. ; Iddings, Rock Minerals, 360, 1906 : 



Wulfing, loc. cit. 



21. Andradite, Fluminimaggiore ; Serra, Rend. R. Accad. Sci., Napoli, 



222, 1910. 



22. Andradite, Dognaczka ; Seebach, loc. cit. 



23. Demantoid, Polewski-Zawod ; Seebach, loc. cit. 



