Abstract

Aa lava, Formation of 641 
—lavas, Chronological table of 629 
Abbott, C. G., cited on solar radiation 83 
— — —sun-spots’ relation to climatic changes 485 
— — —volcanoes’ relation to climatic changes 483–484 
Adams, F. D., Acted as toastmaster at annual dinner 80 
—cited on magmatic assimilation 261 
—, Discussion of magmatic differentiation by 46 
—, Graphic method of representing the chemical relations of a petrographic province 43 
Adams, N. K., Analysis of Adirondack rock by 251 
Adhémar, — —, cited on gravitational attraction of glacial ice-body 223 
Adirondacks region, Magmatic differentiation and assimilation in 45, 243 
— —. Petrology of 244 
Adirondacks, New point in the geology of the 47 
Africa, Changes of climate in 528, 541 
—, Inclosed lakes of 563 
—, Reference to climatic changes in 482 
African dinocephalians’ relation to American pelycosaurs 143 
Agassiz, A., Reference to explorations by 166 
Aa lava, Formation of 641 
—lavas, Chronological table of 629 
Abbott, C. G., cited on solar radiation 83 
— — —sun-spots’ relation to climatic changes 485 
— — —volcanoes’ relation to climatic changes 483–484 
Adams, F. D., Acted as toastmaster at annual dinner 80 
—cited on magmatic assimilation 261 
—, Discussion of magmatic differentiation by 46 
—, Graphic method of representing the chemical relations of a petrographic province 43 
Adams, N. K., Analysis of Adirondack rock by 251 
Adhémar, — —, cited on gravitational attraction of glacial ice-body 223 
Adirondacks region, Magmatic differentiation and assimilation in 45, 243 
— —. Petrology of 244 
Adirondacks, New point in the geology of the 47 
Africa, Changes of climate in 528, 541 
—, Inclosed lakes of 563 
—, Reference to climatic changes in 482 
African dinocephalians’ relation to American pelycosaurs 143 
Agassiz, A., Reference to explorations by 166 

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