INDEX. 



669 



Lie's Theory of Continuous Groups, 



237, 481. 

 Limnaiomyces, 428. 



Hydrocharis, 429. 



Tropisterni, 428. 

 Lycium geniculatum, 566. 

 Lygodesmia raniosissiraa, 315. 



Magaranthus sulphureus, 566. 

 Mermiria, 41. 



alacris, 43. 



bivittata, 42. 



intertexta, 42. 



neomexicana, 43. 



rostrata, 44. 



texana, 42. 



vigilans, 43. 

 Metamerism of Hirudinea, 283. 

 Mexican plants, 305. 

 Michelson. A. A., The Echelon Spec- 

 troscope, 109-119. 

 Mikania eriophora, 341. 

 Mimosa Deamii, 324. 



Psilocarpa, 325. 

 Misgomyces, 143. 



Dyschirii, 443. 



Stomonaxi, 443. 

 Monoicomyces, 412. 



Britannicus, 413. 



Homalotae, 412. 



invisibilis, 414. 



St. Helenae, 413. 

 Musical Pitch, 451. 



Napaia. 48. 



Narragansett Basin, 397. 

 Nitro Compounds, 261. 

 Nominating Committees, 613, 618. 



Oeonomus, 47. 

 altus, 47. 

 Officers elected, 608, 615; List of, 643. 

 Opeia testacea, 46. 

 Orphulella, 46. 

 Ostrakichnites carbonarius, 403. 



Packard, A: S., View of the Carbon- 

 iferous Fauna of the Narragan- 

 sett Basin, 397-405. 



Peirce, B. ()., On the Thermal Con- 

 ductivity of Vulcanite, 73-80. 



Perezia Nelsonii, 342. 



Perlexia Pringlei, 562. 



Peyritschiella Amazonica, 427. 

 protea, 427. 



Physalis acuminata, 311. 

 philippensis, 568. 

 Pringlei, 811. 

 Bydbergii, 569. 

 saltillensis, 568. 

 sordida, 568. 

 subintegra, 567. 



Physical Laboratory of the Massachu- 

 setts Institute of Technology, 

 Contributions from, 451. 



Physico-chemical Equilibrium, 1 ; Re- 

 action, 469. 



Piptothrix Goldmanii, 328. 



Pitch, Musical, 451. 



Platybothrus, 49. 



Polyascomyces, 414. 

 Trichophyae, 415. 



Polygonum Meisnerianum, 324. 



Porophyllum brachypodum, 341. 



Protichnites narragansettensis, 402. 



Psoloessa, 51. 



Rhachomyces Canadensis, 436. 

 Cayennensis, 438. 

 Cryptobianus, 437. 

 Philonthinus, 435. 

 stipitatus, 438. 

 tenuis, 437. 

 Thalpii, 436. 

 velatus, 435. 

 Zuphii, 436. 



Rhizomyces crispatus, 434. 



Richards, T. W.,On the Determination 

 of Sulphuric Acid in the Presence 

 of Iron, 375-383; The Driving 

 Energy of Physico-chemical Re- 

 action and its Temperature Coeffi- 

 cient, 469-480 ; A Revision of the 

 Atomic Weight of Calcium, 611 ; 

 A Table of Atomic Weights, 621. 



Richards, T. W., and Baxter, G. P., 

 A Revision of the Atomic Weight 

 of Cobalt ; third paper : The An- 

 alysis of Cobaltous Chloride and 

 Oxide, 50-72 ; A Revision of the 

 Atomic Weight of Iron, 251-260. 



Richards, T. W., Collins, E., and 

 Heimrod, G. W., The Electro- 

 chemical Equivalents of Copper 

 and Silver, 121-150. 



