3 
CONTENTS OF VOL. XIII. 
PAGE 
The Geology of London. By Horace B. Woodward, F.G.S. Il- 
lustrated 1 
What to believe in Science: Teleology or Evolution. By 
the Bev. T. R. R. Stehbing 11 
Algh:: their Structure and Mode of Reproduction. By Alfred 
W. Bennett, F.L.S. Illustrated 25 
House Martins as Builders. By Henry J. Slack, F.G.S. ... 37 
A Photograph in Natural Colours. By J. Traill Taylor ... 41 
On Name and Race in England, By Dr. Richardson, F.R.S. ... 50 
Gigantic Cuttle-Fish. By W. Saville Kent, F.L.S. Illustrated... 113 
On the Sphygmograph, or Pulse-Recorder. By A. H. Garrod, 
B.A 128 
The Field Telegraph. By A. Hilliard Atteridge. Illustrated ... 141 
Side Lights on the Potato Disease. By Worthington G. Smith, 
F.L.S. Illustrated .. ... 150 
Air beneath the Microscope. By the Editor. Illustrated ... 162 
On the Transmission of Sound by the Atmosphere. By J. 
Tyndall, D.C.L 175 
Plumularians. By the Rev. T. Hincks, F.R.S. Illustrated ... 225 
British and Foreign Preparations for the Transit of Venus. 
By R. A. Proctor ... ... ... 238 
On the Natural History and Geographical Distribution of 
Living and Extinct Bears. By A. Leith Adams, F.R.S. ... 250 
On the Lichen-Gonidia Question. By the Rev. J. M. Crombie, 
F.L.S. Illustrated ... 260 
The Logograph, or Writing by the Voice. By W. H. Barlow, 
F.R.S 278 
The Song of Fishes. By John C. Galton, F.L.S. Illustrated ... 337 
