428 



H. S. Suvimers : 



Having calculated the iionn., the next step is to classify each 

 analysis. The classification of the analysis of the AFt. Elephant 

 example is obtained in the following manner: 



Sal. 

 Feni- 



86.3 7 5 

 13:5^1^3 



= Class II. Dosalane 



Quartz -13.5 5 3 „ . 



Feh^v ~ 400 ^ 3 ^ f) ^ ^"'^^'^ ^"- Q"^''f*^Jic -Hispanare 



K,0 + Na,0 45 5 3^ ttt . „ , 



Q^Q = ^<g>g = ltang. III. Alkah-calcic— Almerase 



K.,0 ^ 20 5 3 



Na.,0 25 *^ 3 ^ 5 



= Sub-rang. III. 8odi-potassic— Almerose 



In a similar manner the classification of the other analyses is 

 worked out, and a table is given showing tlie subdivisions to 

 which each belonirs. 



No. Class. 



I. - II. Dorsalane 



II. - I. Persalane 



III. - I. Persalane 



IV. - II. Dorsalane 



V. - II. Dorsalane 



VI. - II. Dorsalane 



VII. - ir. Dorsalane 



Vril. 11. Dorsalane 



IX. - I. Persalane 



Order. 



III. Quarfelic 



Hi span a re 

 III. Quarfelic 



Col u m bare 

 III. Quarfelic 



Col um bare 

 III. Quarfelic 



Hispanare 

 III. Quarfelic 



Hispanare 

 III. Quarfelic 



Hispanare 

 III. Quarfelic 



Hispanare 

 III. Quarfelic 



Hispanare 

 IJI. Quarfelic 



Columbare 



III. 

 III. 

 III. 

 III. 

 III. 

 III. 

 III. 

 III. 

 III. 



Rang. 



Alkali-calcic 

 Almerase 

 Alkali-calcic 

 Riesenase 

 Alkali-calcic 

 Riesenase 

 Alkali-calcic 

 Almerase 

 Alkali-calcic 

 Almerase 

 Alkali-calcic 

 Almerase 

 Alkali calcic 

 Almerase 

 Alkali-calcic 

 Almerose 

 Alkali-calcic 

 (Piemanase) 



III, 

 III. 

 III. 

 III. 

 III. 

 III. 

 I. 

 III. 

 III. 



Sub-rang. 



, Sodi-potassic 

 Almerose 

 Sodi-potassic 

 Riesenose 

 Sodi-potassic 

 Riesenose 

 Sodi-potassic 

 Almerose 

 Sodi-potassic 

 Almerose 

 Sodi-potassic 

 Almerose 

 Perpotassic 

 (Urallaose) 

 Sodi-pota.ssic 

 Almerose 

 Sodi-potassic 

 (Piemanose) 



To those unacquainted with this system of classification the 

 subdivisional names can convey no meaning unless the positions 

 of these subdivisions are known, and therefore I include a table 

 of portions of Classes I. and II. The small numbers in brackets 

 indicate the number of high-class analyses of terrestrial igneous 



