TABLE OF CONTENTS. 



VII 



PHYSICS Continued. 

 Light : 



1. Reflection Pa^e 1 1 1 



2. Refraction 1 12 



3. Dispersion 113 



4. Interference and Polarization 117 



Electricity : 



1. Magnetism 120 



2. Electromotors 1 2 L 



3. Velocity 122 



4. Electrolysis , 124 



5. Electric Spark 124 



6. Electric Light 127 



7. Thermo-electricity 130 



CHEMISTRY. By George F. Barker, Professor of Physics in the Uni- 

 versity of Pennsylvania, Philadelphia 131 



General 131 



Non-Metallic 132 



Metallic 136 



Organic 110 



Physiological 144 



Technical 116 



MINERALOGY. By Edward S. Dana, Ph.D., Yale College, New Haven, 



Conn 151 



Recent Publications 151 



Foreign Researches 152 



American Researches 154 



New Mineral Species 157 



Meteorites 162 



GEOLOGY. By T. Sterry Hunt, LL.D., F.R.S., Professor of Geology, In- 

 stitute of Technology, Boston, Mass 165 



Geology of Newfoundland 165 



Pre-Cambrian Rocks of Wales 168 



Rocks of the Ardennes 169 



Geology of Vermont 169 



Geology of Wisconsin 170 



Eozoic Rocks West of the Missouri 171 



Eozoic Rocks of the Blue Ridge 172 



Geology of the Cincinnati Anticlinal 173 



The Carboniferous Rocks in Kentucky 174 



The Ontario Salt Region 175 



Subterranean Temperature 176 



Tertiary Formation of the Arctic Regions 177 



Fossil Floras 177 



Ancient Arctic Climate 178 



