CONTENTS. 
PAGE 
Sylvester's and other Unisignants. By Thomas Muir, LL.D., F.E.S. 187 
Sylvester's Axisymmetric Unisignant. By Thomas Mum, LL.D., 
F.R.S 197 
Colloidal Gold and "Purple of Cassius." By James Moir, M.A., 
D.Sc, F.O.S., F.R.S.S.Af .203 
Some Remarkable Oxidation-Products of Benzidine. By James 
Moir, M.A., D.Sc, F.O.S., F.R.S.S.Af 205 
Preliminary Note on the Meteorites in the Bloemfontein Museum. 
By W. A. Douglas Rudge, M.A. (With Plates v., vi., vii. and 
ten text-figures) 211 
The Funeral Ceremonies of the Hottentots. By C. Leo Biden and 
Rev. H. Kling 223 
Photography an aid to Astronomy. Presidential Address. By 
S. S. Hough, M.A., F.R.S 227 
Some New South African Succulents and other Plants. Part IV. 
By R. Marloth, Ph.D., M. A., F.R.S.S.Af. (With two text-figures) 237 
On the Early Babylonian Eclipse of the Sun. By E. Nevill, F.R.S., 
F.R.S.S.Af 243 
Observations on the Inheritance of Characters in Zea mays, Linn. 
By J. Burtt-Davy, F.R.S.S.Af., F.L.S., F.R.G.S. . . .261 
The Spectrum of the Ruby. — Part II. — and the Artificial Ruby. By 
James Moir, M.A., D.Sc, F.C.S., F.R.S.S.Af 271 
Notes on the Spectra of the Precious Emerald and other Gem-stones. 
By James Moir, M.A., D.Sc, F.C.S., F.R.S.S.Af. . . .273 
A Note on the Principal Systematic Work and Publications dealing 
with the South African Proteaceae. By E. P. Phillips, M.A. . 275 
Terrestrial Isomagnetic Lines for South Africa for the Epoch July 
1, 1903. By J. C. Beattie, D.Sc, F.R.S.S.Af. (With four 
Maps, Plates viii., ix., x., xi.) 283 
Relations between the Eccentricities and Inclinations of the Or- 
bits of the Planets Jupiter and Saturn. By R. T. A. Innes, 
F.R.S.S.Af 287 
A Note on the Land and Sea Breezes of South Africa. By J. R. 
Sutton, ScD., Hon. Memb. R. Met. Soc, F.R.S.S.Af. . . .293 
The Algebraical Development of the Elliptic Perturbative Function 
used in the Theories of Planetary Motion. By R. T. A. Innes, 
F.R.S.S.Af 301 
Some Observations concerning the Transmission of East Coast Fever 
by Ticks. By Dr. Arnold Theiler, C.M.G., Acting Director of 
Veterinary Besearch 319 
