PRINCIPAL CONTRIBUTORS TO THIS VOLUME. 
Gkant Allen, Dorking. 
Oliver V. Aplin, 
A. B. Badger, B.A., New College, Oxford. 
Edward W. Badger, Birmingham. 
J. E. Bagnall, A.L.S., Birmingham. 
H. Balfour, M.A., F.Z.S., Oxford. 
Alfred Browett, Birmingham. 
E. W. Burgess. 
Ch. Callaway, D.Sc., F.G.S., Wellington, Salop. 
Edmund Catchpool, B.Sc., Sheffield. 
Charles Cochrane, Pedmore. 
W. Warde Fowler, M.A., Oxford. 
W. S. Gresley, F.G.S., M.A., Overseal. 
W. B. Grove, M.A., Birmingham. 
W. Hillhouse, M.A., F.L.S., Birmingham. 
W. B. Hughes, F.L.S., Birmingham. 
W. P. Marshall, M.I.C.E., Birmingham. 
John B. B. Masefield, M. A., Bosehill, Cheadle, 
Wm. Mathews, M.A., Birmingham. 
Geo. W. Mellors, Nottingham. 
B. C. L. Perkins, Jesus College, Oxford. 
E. B. Poulton, M.A., F.B.S., Oxford. 
J. H. P oynting, D.Sc., F.B.S., Birmingham. 
C. Pumphrey, Birmingham. 
J. Saunders, Luton. 
Beeby Thompson, F.C.S., F.G.S., Northampton. 
T. H. Waller, B.A., B.Sc., Birmingham. 
Joseph W. Williams, D.Sc., Stourport. 
ILLUSTRATIONS IN VOLUME XII. 
Map of Norway Tour .. 
Stigmariae from the Coal Measures 
Diagrams Illustrating Theories of Heredity .. 
to face 
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