vi List of the Contributors. 



Bell, Chichestee A., M.B. page. 



On a Series of Bases derived from Pyrrol, and some Com- 

 pounds allied to tliem and to Mucic Acid, ... 33 

 Furtlier Observations on Pyrrol and its Derivatives, • . . 168 

 {See also Lappee, Edwin.) 



BiACKWAiL, John, F.L.S. ; and Cambeid&e, Rev. 0. P., M.A., 



A List of Spiders captured in the Seychelles Islands, by Pro- 

 fessor E. Perceval "Wright, M.D., F.L.S. ; with Descrip- 

 tions of Species supposed to be new to Arachnologists, . 1 



BEiiNNOW, Feancis, Ph.D., F.R.A.S. 



Discussion of Observations for determining the Parallax of 

 the Planetary Nebula, 37, H. IV. Made with the South 

 Equatorial at Dunsini, 125 



Btjeton, C. E., B.A. 



On Recent Researches respecting the Minimum visible in the 



Microscope, 248 



BtmioN, Philip. 



On the Supernumerary Rings of the Rainbow, . . .186 

 On Halos and AtheUa, . . . . . . . . 403 



Cambetdge, Rev. 0. P. — {See Blackwail, John.) 



Church, A. H., M.A., Oxon. 



On the Constitution of the Native Phosphates of Aluminum, . 551 



DAvy, Edmund W., A.M., M.D. 



On a New Chemical Test for Carbolic Acid, and its Useful 



Applications, . . . . . . . . .155 



Notes of some Observations on Nitrification, .... 242 



Preliminary Report on some New Organic Nitroprussides, . 313 

 On a New and Expeditious Method for the Determination of 



the Nitrites, under different Circumstances, . . . 563 



Debtee, J. L. E., M.A., Ph.D. 



Note on the Meteors connected with First Comet of 1870, . 255 

 The Instruments in the Old Observatory at Peking, . . 468 

 A New Determination of the Constant of Precession, . . 617 



Q-AllOWAT, ROBEET, F.C.S. 



On the Extraction of Iodine and Bromine from Kelp, . . 152 



Oeeen, Rev. W. S., M.A. 



Report on a Journey among the New Zealand Glaciers in 1882 



(Plate xviii.), . . . 642 



