Twentieth Year of Publication. 
THE 
JOURNAL OF SCIENCE 
AND ANNALS OF 
JUtonffmtj, Utnlogn, (ijralogii, Industrial Jhfs, 
JJtamtfarturcs, and feljttDlngiT. 
MONTHLY, FORMERLY “THE QUARTERLY JOURNAL OF SCIENCE. 
PRJCE, ONE SHILLING AND SIXPENCE. 
This Journal is an established medium of communication 
between the Scientific Investigator and the Reading Public, as 
well as between Students in the various branches of Science. It 
also constitutes a Review of the Progress of Science in all parts 
of the world. Its past and present Contributors include the 
following names : — 
F. A. Abel, C.B.. F.R.S. 
Prof. Ansted, F.R.S. 
W. E. A. Axon 
Prof. W. E. Ayrton 
Rev. S. Barber 
Prof. W. F. Barrett 
Dr. Lionel S. Beale. F.R.S. 
Dr. G. M. Beard 
Thomas Belt 
A. W. Bennett 
Professor Bentley 
E. W. Binney, F.R.S. 
Dr. H. Carrington Bolton 
F. W. Brearty 
Sir Charles Bright 
H. W. Bristow, F.R.S 
Capt. Richard F. Burl 
Dr.W. B. Carpenter, C.L 
F.R.S. 
J.TOI. A. H. Church 
Professor Coughtiie 
James Croll, F.R.S. 
William Crookes, F.R.S. 
F. C. Danvers 
W.Boyd Dawkins, F.R.S, 
Dr. Henry Draper 
Colonel Drayson, R.A. 
-Sir William Fairbairn, 
Bart., F.R.S. 
Frederick Field, F.R.S. 
Rev. O. Fisher 
Camille Flammarion 
;Sir Charles Fox 
Prof. Frankland, F.R.S. 
Dr. Gladstone, F.R.S. 
James Glashier, F.R.S. 
George Gore, F.R.S. 
A. Vernon Harcourt, 
F.R.S. 
Prof. Harkness, F.R.S. 
Prof. W. Noel Hartley 
Rtv. S. Haughton, F.R.S. 
Prof. F. V. Hayden 
Sir John Herschel, F.R.S. 
Rev. H. H. Higgins 
J. R. Hind, F.R.S. 
Prof. Hofmann, F.R.S. 
William Huggins, F.R.S. 
| Prof. Hull, F.R.S. 
| Robert Hunt, F.R.S. 
| H. M. Jenkins 
I Prof. W. Stanley Jevons, 
F.R.S. 
j G. H. Kinahan 
| Prof. W. King 
l Sir Francis Knowles, 
Bart., F.R.S. 
i Lankester, F.R.S. 
f Prof. A. R. Leeds 
l J. Norman Lockyer, 
F R S 
Robert Mallet, F.R.S. 
Dr. R. J. Mann 
Prof. N. S. Maskelyne, 
F.R.S. 
Prof.Thompson B. Maury 
Prof. Henry Morton 
J. Chalmers Morton 
Prof. M. M. Pattison 
Muir 
J. Munro 
Edmund Neison 
Prof. Simon Newcomb, 
F R S 
Prof. Odling, F.R.S. 
Capt. Oliver, R.A. 
Dr. J. Bell Pettigrew, 
F.R.S. 
Edward T. Hardman 
Dr. Paul 
William Pengelly, F.R.S. 
Prof. Phillips, F.R.S. 
J. A. Phillips 
Raoul Pi&et 
Mungo Ponton 
S. Tolver Preston 
T. Symes Prideaux 
H. Baden Pritchard 
R. A. Prcdor 
C. W. Quin 
Prof. A. C. Ramsay, F.R.S. 
G. F. Rodwell 
Dr. Rolleston, F.R.S. 
G. J. Romanes, F.R.S. 
James Samuelson 
Dr. A. E. Sansom 
Dr. P. L. Sclater, F.R.S 
R. H. Scott, F.R.S. 
Prof. H.G. Seeley, F.R.S. 
J. W. Slater 
Dr. R. Angus Smith 
F.R.S. 
Piazzi Smyth 
H. C. Sorby, F.R.S. 
Prof. Balfour Stewart 
F R S 
W. T.’ Suffolk 
Prof. Silvanus Thompson 
William Topley 
Prof. T) ndall, F.R.S. 
Dr. Voelclcer, F.R.S. 
Alfred Russel Wallace 
Dr. Wallich 
Dr. W. M. Watts 
Rev. J. Clifton Ward 
Dr. F. C. Webb 
W. Mattieu Williams 
Henry Woodward, F.R.S 
Horace B. Woodward 
Prof. Zollner 
LONDON : 3, HORSE-SHOE COURT, LUDGATE HILL, 
And All Booksellers. 
