CONTENTS OF YOL. YI 
PAGE 
Ox the Mode oe Growth of some of the Alg^. Illustrated by 
a few of the Common Kinds. By J. Braxton Hicks, M.D., F.R.S., 
F.L.S., &c. Illustrated ... ... ... ... 1 
The Geology of Sinai. By the Rev. E. W. Holland, M.A. ... 10 
The Planet Mars in January, 1867. By Richard A. Proctor, 
B.A., F.R.A.S. Illustrated 22 
On Water Filters. By Edward Divers, M.D., F.C.S. Illustrated 33 
Our Fresh-water Entomostraca, Shell-Insects, or Water- 
Fleas. By W. Baird, M.D., F.L.S. Illustrated... 42 
How to Photograph Microscopic Objects. By Edward T. Wilson, 
M.B. Oxon. Illustrated ... ... 54 
Recent Discoveries in Insect Embryogeny. By Henry Fripp, 
M.D. Illustrated ... ... ... ... ... 110 
On the Struggle for Existence amongst Plants. By J. D. 
Hooker, M.D., F.R.S 131 
How to Study Meteorology. By G. F. Chambers, F.R.A.S. 
Illustrated ... ... ... ... 140 
On Sensitive Flames. By W. F. Barrett. Illustrated 154 
Paraffin Lamps and their Dangers. By John Attfield, Ph.D., 
F.C.S 167 
An Attempt to Approximate the Date of the Flint Flakes 
of Devon and Cornwall. By Spence Bate, F.R.S. Illustrated 169 
Venus’s Flower-basket (Euplectella). By Dr. J. E. Gray, F.R.S. 
F.L.S. Illustrated 239 
Jupiter without his Satellites. By Richard A. Proctor, B.A., 
F.R.A.S. Illustrated 248 
Fitz-Roy Weather Forecasts. By G. F. Chambers, F.R.A.S., 
Illustrated ... ... ... ... 258 
On Life Insurance and Vital Statistics. By W. Hardwicke, M.D. 271 
New Electro-Magnetic Machines. By. S. J. Mackie. Illustrated 281 
The Botany of a Coal Mine. By William Carruthers, F.L.S. 
Illustrated ... ... 289 
The Microscope in Geology. By David Forbes, F.R.S. Illustrated 355- 
Why the Leaves Fall. By Maxwell T. Masters, M.D., F.L.S. ... 369 
‘A Message from the Stars.’ By Robert Hunt, F.R.S 378 
