1Y 
CONTENTS. 
PAGE 
Popoffkas, or Circular Ironclads. Bj A. Hilliard Atteridge ... 266 
On the Extinct Animals oe North America. Bj Professor 
William H. Blower, E.B.S. Illustrated 276 
Practical Notes on “ Hetero genesis.” Bj tlie Rev. W. H. 
Dallinger, V.P.R.M.S. Illustrated 338- 
Astronomy in America. Bj Richard A. Proctor 351 
On the Progress of Aeronautics. Bj Fred. W. Brearej ... 364 
The Parallel Roads of Glen Roy. Bj Professor Tjndall, D.C.L. 
Illustrated 375 
What is the Meaning of Human Personality ? Bj H. J. Slack, 
F.G.S 389 
The Vivisection Clamour. Bj the Editor 398 
Reviews of Books 84, 185, 299, 406 
Scientific Summary: — 
Astronomj ... ... ... ... ... 98, 202, 315, 420 
Botanj and Vegetable Phjsiologj ... ... 101, 205,319,423 
Chemistrj ... ... ... ... ... 103, 209, 322, 425 
Geographj 325 
Geologj and Palaeontologj 104, 211, 326, 427 
Mechanics ... ... ... ... ... ... ... 106 
Medical Science 107, 213, 328, 439 
Metallurgj, Mineralogj and Mining ... ... 108, 216, 329, 431 
Meteorologj 109, 330 
Microscopj ... 110, 216, 331, 433 
Phjsics Ill, 218, 332. 434 
Zoologj and Comparative Anatom j ... ... 112, 221, 335, 435 
