344 INDEX. 



Egg, of Vertebrata, as a means of classification, 183. 



Egg, structure of, 237. 



Egyptian computation of time, 164, 225. 



Electric current, velocity of, 224, 235. 



Electrical experiment, 251. 



Electrical facts, 252. 



Electro-magnets, 106. 



Emory, W. H. Astronomical observations, 161. Magnetical and 



meteorological observations, 161, 162. 

 Enceladus, 304. 

 Encke's comet, 138. 

 Eppelsheim fossils, 305. 

 Ergasilidae, fam., 54. 

 Erichthonius, gen., M. Edwards, 218. 

 macrodaciylus, D., 218. 

 pugnax, D., 218. 

 Ethnology, linguistic, 165. 

 Euchseta, gen., Philippi, 10, 20. 



communis, D., 21. 



concinna, D., 21. 



diadema, D., 21. 



pubescens, D., 21. 

 EusTis, Henry L. On the Middlesex tornado, 295, 298. 

 Everett, Edward. On the satellites of Saturn, 4, 5. 

 Exploring Expedition, works of, 124. 



Farrar, John. On the solar eclipse of September 17th, 1811, 325. 

 Fellows. 



Abbot, Samuel L., 224. 



Adams, C. B., 158. 



Alexander, Stephen, 239. 



Bouve, T. T., 233. 



Bowditch, Henry I., 3. 



Burnett, Waldo J., 269. 



Cabot, Edward C, 3. 



Caswell, Alexis, 245. 



Channing, W. F., 163. 



