9 



Page. 



Lava-plain in Idaho ... 4-'; 



Lead, native 3 



oxide 3 



Lecture-course, programme.. 95 

 Limestone 15-19. 22, 58 



erosion of 60-65 



Literature of electrolysis 163 



Locomotion of animals. . . 164-167 

 Magnetite of Gunnison, Col- 

 orado. . 7 



Mammoth cave of Kentucky. . 59-66 

 Manganese ore, in Southwest 



Virginia 163 



Maple juice, sap-sand 168 



Marbles of Virginia 163 



Marmolite 58 



Members, election of new. .TJ, 105, 

 129, 150, 158, 163, 176, 180 



deceased. 77, 108, 158, 159, 164 

 Meteorites, fusion-structures 



in 153-155 



Methods of animal locomotion, 



164, 167 

 Minerals of Weehawken tun- 

 nel 129-131 



Mineral resources of South- 

 west Virginia 159-163 



Mining, Idaho 4-6 



Montana 4-6 



Nevada 7,172-175 



Southwest'n Colorado .... 7-8 



Utah 168-172 



Montana, lorests and mining. 5 

 Moon, horizontal enlargement 



116-118 



photographs of 143-145 



Moral bearing of recent physi- 

 cal theories 96-99 



Mound-builders 121-122 



Natrolite from Weehawken, N.J. 130 



Nevada, mining in 7 



pumice-tuff 51 



sulphur deposits. . . 172-175 



New York, drift hills 77-80 



glaciation 24-31,57 



gold deposits I 



New York Island, glaciation.. 30 



Laurentian age 57 



North Carolina, emeralds. 101-105 

 fluid-bearing quartz crys- 

 tals 131-136 



stone implement 85 



Page. 



North Pole, discovery of . . . .46-48 

 Observatories, time - signals 



from 86-87 



Obsidian implements from 



Guatemala 105 



Oregon, volcanic ash 55 



Organic aromatic bases, com- 

 pounds of 100 



Organ-pipe sonometer 163 



Origin of carbon minerals. 109-1 1 1 



Peat, transformation of... 71-76 



artificial conversion into 



coal 75 



Peperino in Texas 52 



Perspective, binocular 9-15 



Petroleum -testers i 39-143 



Photography applied to astro- 

 nomy 143-146 



recent advances in 176 



Physical theories, moral bear- 

 ing 96, 99 



Porphyry '9-49 



Pot-holes near Williams- 

 bridge, N. Y 181-183 



Prevention of tubercular dis- 

 ease 1 81 



Pumice 49-52, 56 



Quartz crystals, fluid-beaiing, 



131-136 



Report of Library Committee . 125 



Publication Committee.. 125 



Recording Secretary 125 



Treasurer 124 



Rhodochrosite from Uiay 



mines, Colorado 3 



Rhyolyte 53. ^73 



Rocks, thin sections. . . 49-53, I5J- 



Saba, W. L, geology 23 



Safety of kerosene oil 137-143 



Salem witchcraft excitement, 



I5'>-I53 

 Salmon fishery on Salmon 



river 6 



Sandstone in Northern Tex- 

 as 15-19 



Sapphire from Ceylon 1 29 



Sap-sand in maple juice 168 



Scranton, Penn., peat 71-76 



Serpentine 57-58 



Shale in Northern Texas . . . . 1 5-19 



Shell implements 121, 147 



Silver in Lake copper 4 



