PREFACE 
TO THE SECOND EDITION. 
I ^HIS Second Edition has been broug-ht out by the 
^ Yorkshire Naturahsts' Union, and I am very much 
indebted to the successive Secretaries, Mr, W. Denison 
Roebuck, F.L.S., and Mr. T. Sheppard, F.G.S., for the 
pains they have taken in seeing it through^the press. 
The First Edition was published in 1863, and in January, 
1866, I left Yorkshire to become a member of the staff of the 
Herbarium of the Ro3al Gardens, Kew, so that what has 
been done in the field covered by the book since the First 
Edition was published, has been almost entirely the work 
of others. I have especially to thank Mr. J. Edmund 
Clarke and Mr. H. M. Platnauer for revising- the chapter 
on Geology ; the late Mr. G. M. Whipple, of the Kew 
Observatory, for a supplement to the chapter on Climate ; 
and Professor Percival, now of Reading, for revising the 
account of the Yore drainage district. 
Since 1863, only fifteen flowering plants and ferns (not 
reckoning aliens) have been added to the flora of the Riding ; 
but in mosses the new species and localities are very 
numerous, and I and my readers are very much obliged to 
Mr. M. B. Slater for editing this portion of the work, and 
for adding an account of the Hepaticse of the Riding, which 
were v'ery little known at the time the First Edition was 
published. 
J. G. BAKER. 
3, Cumberland Roau, 
Kew, January 8th, igo6. 
