IV 
CONTENTS. 
Balloon Ascents, and their Scientific Importance. By James 
Glaisher, F.R.S., President of the Microscopical Society, &c., &c. 
Illustrated ... 
On the Highest Magnifying Powers and their Uses. By 
Lionel S. Beale, M.B., F.R.S., Fellow of the Royal College of 
Physicians, Physician to King’s College Hospital, Professor of 
Physiology, &c., in King’s College, London 
Darwin’s Observations on the Physiology of the Process of 
Fertilization in Plants. By M. C. Cooke. Illlustrated ... 
What is a Tonic? By Edward Divers, M.D., F.C.S., Professor of 
Materia Medica and Therapeutics in Queen’s College, Birmingham 
The Eruption of Etna. By S. J. Mackie, F.G.S. ... 
Inside the Eye : the Ophthalmoscope and its Uses. By Ernest 
Hart, Ophthalmic Surgeon, and Lecturer on Ophthalmic Surgery 
and Medicine at St. Mary’s Hospital Medical School. Illustrated. 
On the Means of Communicating between Guards and Passen- 
gers ON Railways. By Thomas Symes Prtdeaux 
Is the Whitebait a Distinct Species ? By the Editor. Illus- 
trated ... ... ... ... ... ... ... ... ... 
Atlantic Telegraphy. By Robert Hunt, F.R.S. Illustrated ... 
On Pure Water. By Edwin Lankester, M.D., F.R.S 
On the Nature and Diagnostic Value of Raphides and other 
Plant Crystals. By Professor Gulliver, F.R.S. 
On Lake Basins. By Professor D. T. Ansted, M.A., F.R.S. Il- 
lustrated 
Epidemics : Past and Present. Their Origin and Distribution 
On the Microscopic Anatomy of an Insect Larva : Corethm 
Plumicornis. By E. Ray Lankester. Illustrated 
The Moon. By James Breen, F.R.A.S. Illustrated 
Photography and some of its Applications. By the Editor . . . 
403 
Reviews of Books 
Scientific Summary — Agriculture 
Astronomy 
Botany and Vegetable Physiology 
Chemistry 
Geology and Palaeontology 
Mechanics 
Medical Science 
Metallurgy and Mining 
Meteorology 
Microscopy 
Mineralogy 
Photography 
Physics ... 
Zoology and Comparative Anatomy 
419 
424 
437 
447 
457 
468 
477 
543 
553 
568 
583 
593 
605 
612 
622 
86 , 214 , 353 , 487 
103 , 228 , 367 , 502 
100 , 230 , 368 , 503 
104 , 233 , 373 , 506 
108 , 237 , 377 , 509 
113 , 242 , 380 , 513 
117 , 253 , 383 , 518 
119 , 246 , 385 , 520 
124 , 251 , 388 , 525 
126 
127 , 255 , 391 , 528 
129 , 257 , 388 
130 , 258 , 392 , 530 
134 , 263 , 396 , 535 
140 , 267 , 399 , 538 
