vi 
CONTENTS. 
PAGE 
Classification of Comets. By R. A. Proctor 350 
First Principles of Aerial Transit. By F. H. Wenham, C.E. 362 
The Thermometer as a Companion in Daily Life. By A. H. 
Garrod . 370 
The Vegetable Cell. By A. W. Bennett, F.L.S. Illustrated ... 382 
The Channel Tunnel. By W. Topley, F.G.S. Illustrated ... 394 
The Woolwich Balloon Ascent. By Capt. C. Orde Brown. 11- 
lustrated 
404 
Reviews of Boors 
Scientific Summary: — 
... 62, 186, 289, 411 
Astronomy 
... 78, 203, 305, 424 
Botany and Vegetable Physiology 
... 82, 205, 311, 428 
Chemistry 
... 85, 208, 313, 433 
Geology and Palaeontology 
... 89, 210, 316, 436 
Mechanics 
94, 214, 319 
Medical Science 
... 95, 215, 321, 438 
Metallurgy, Mineralogy, and Mining ... 
... 100,217,324,441 
Microscopy 
... 102,218,326,442 
Physics ... 
... 104,221,329,443 
Zoology and Comparative Anatomy ... 
... 106,223,333,446 
