552 



INDEX. 



Dry plates, pliotograpliic, a mctliod 

 of mcasiiriug the absolute scu- 

 sitivcuess ot', 159. 



E. 



Ecliidiocarya, 2S6. 



Arizoiiica, 280. 

 Ecliiiioglocliiu, Gray, 259. 

 Ecliinospermum, Lclini., 258. 

 Electric potential of llic upper air, on 



obtaining the, 459. 

 Electricity, atmospheric, 448. 

 Electrometer, multiple quadrant, 451. 

 Electrometers, 418. 

 Ellisia Torreyi, 302. 

 Emmons, E., letters, 184, 186, ISS, 



189, 190._ 

 Energy, superficial, and tliermo-elee- 

 tricity, relation between. 417. 



surface, two ways of cousidcriug, 

 417. 



between two media, 421. 

 EophrynoidiX!, Karsch, 14, 18. 

 Eoplirynus, AVoodward, 19. 



Prestvicii, Woodward, 14, 19. 



Salmi, Stur, 19. 

 Eoscorpionida^,, 21. 

 Eoscorpius, Meek and Worthen, 21. 



anglieiis, Woodward, 14. 22. 



curboiiarins. Meek and Wortheu, 

 14, 21. 



cuirlyptus, Pcaeli, 22. 



glaber, Peach, 23. 



inflatus. Peach, 22. 



tuberculatus. Peach, 22. 

 Erigeron nudatus, 297. 

 Eriogonum arborescens, Greene, 371. 



corymbosum, 371. 



foliosum, 371. 



gigauteum, 371. 



gracile, 372. 



hirtiflorum. Gray, 370. 



Oreuttianum, 371. 



suffrutieosum, 370. 



va<irans, 370. 

 Eritriehium, Schrad., 2G0. 

 Euphorbia Raltaui, 372. 

 Eureka quartzite, 231, 233, 234, 



235. 

 Eusfis, TTenry Lawrence, notice of, 



513. 

 Exposers, photographic, methods of 

 determiuiug the speed of, 478. 



Exposers, photographic, principles 



involved in the construction 



of, 183. 

 (1.) Positionof thcexposer, 483. 

 (2.) Construction of the exposer, 



484. 

 (3.) Shape of the aperture in the 



exposer, 484. 

 (4.) Motive power, 488. 

 Exposures, instantaneous, apparatus 



for measuring, 480. 



F. 



Fauna?, Infra-Primordial, Primordial, 

 and Supra-Primordial, 228, 

 255. 

 Pcllows, Associate, deceased : — 



Alpheus S. Packard, 505. 



Benjamin Silliman. 513. 

 Fellows, Associate, elected : — 



Cleveland Abbe, 506. 



Albert A. Miehelson, 508. 

 Fellows, Associate, List ot", 544. 

 Fellows deceased : — 



Samuel Cabot, 511. 



George B. Dixwcll. 511. 



Henry L. Eustis, 513. 



Kobert W. Hooper, 511. 



Edward Jarvis, 506. 

 Fellows elected : — 



"William jNTorris Davis, 506. 



William Leslie Hooper, 506. 



Alonzo Smith Kimball, 501. 



Augustus Lowell, 511. 



Edward Laurens Mark, 506. 



Lewis Mills Korton. 511. 



Benjamin Osirood Peirce, 506. 



Denman Waldo Boss, 508. 



Edwin Forrest Sawyer, 511. 



Harold Whiting, 506. 

 Fellows, List of, 541. 

 Filter, anthracene, 391, 392. 



asbestos, 390. 

 Filtration by means of easily soluble 

 and easily volatile filters, a 

 method of, 390. 

 Fish eggs, pelagic, on the develop- 

 ment of some, 23. 

 Foreign Honorary Members de- 

 ceased : — 



George Bentham, 505. 



Karl ll. Lepsius, 505. 



iMark Pattison, 505. 



Carl T. E. von Siebold, 511. 



