, die 
236 J.D. Dana on the Isomorphism and 
8. Haiiyne. 
2§ '-=51000- 6. atoms of bases and acid, 14. c¢. atoms of elements, 49. 
48i 230924 A. 7110°32-+2-45 (sp. gr.)=2902°2 
38Al 19954 B. 29022+14—207°3 C. 2902°2—-49—=59-23 
3 Na 1172°7 
a, At. weight, 7110-32 
4. Nosean. 
4 Si ==2309-24 5b. atoms of acids and bases, 12. ¢. atoms of elements, 43. 
1925-4 . 6298:24-—-9'3 (sp. gr.) =2738 36 
4Na 15636 B. 2788-36+12=228-2 0. 27 
18: 
a. At. weight, 6298-24 
XX. Kyanite, X13 Si2—Bucholzite, XSi 
3 
2738-36--43=63°68 
. Kyanite. 
Atomic weight as for Andalusite, 3080°02. A. 3080-02+-3-62 (sp. gr.) =850°83 
B. 850°83—~-5==170165 C. 850: 88—23=37°0 
1Si = 57731 6. atoms of acid and base, 2. ¢. atoms of elements, 9. 
1 Al 641-80 A=1219'11+3'4 (mean sp. gr.) =358°56 
a, At. weight, 121911 B. 358:56~—2—179-28 C. 358°56+9=39°84 
26 Sis (from Bowen's and Hayes’s analyses of Sillimanite) gives (@=3'41, Bow- 
en), A==1915'8; B=174-2; C=—=38-32. 
XXI. Lencopyrite, Fe As—Mispickel, Fe S24-Fe As,— White Iron Pyrites, Fe 82. 
1. Leucopyrite. 
1 As 
=94 c. atoms of elements, 2. 
1Fe 350 A. 1290-+7-228 (sp. gr.) =178" 
a. At. weight, 1290 CO. 178°47—-2==89'24 
[If As is a double atom, then 178°47-+-38=59'49] 
2. Mispickel. 
1 As =940 e. atoms of elements, 5. 
28. 400 A. 2040+6:127 (sp. gr.)=3 
2 Fe 700 C. 833-5666 
' a. At weight, 2040 [Considering As a double atom, 333--6==55'5] 
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