156 NEW PUBLICATIONS. 
In conclusior, I beg to thank you for affording me the opportunity of openly 
expressing my opinions on the reputed errors, and I trust that it will be re- 
ceived generally with the same good feeling as that with which it is dictated. 
lichenists, I shall feel obliged, for my own, as well as for the sake of science, if 
they will at once communicate it to me.— Yours, ete. 
’ : W. MUDD.: 
NEW PUBLICATIONS. 
North Yorkshire : Studies of its Botany, Geology, Climate, and Physical 
Geography. By John Gilbert Baker, With four Maps.  8vo. 
London: Longman. 1863. 
Mr. Baker is favourably known to British botanists by his * Supple- 
ment to Baines's Flora of Yorkshire, and his pamphlet on the * Geo- 
gnostic Relations of the Flowering Plants and Ferns of Great. Britain ;’ 
also by numerous papers in botanical journals upon critical British 
botany. The present work will not merely preserve that reputation, 
but extend it. After an introduction explanatory of what is meant by 
North Yorkshire, he divides his book into three parts, treating severally 
(1) upon the Geology, Climatology, and Lithology, (2) the Topography 
and Physical Geography, and (3) the Botany of the district. The 
geological essay is well executed, and conveys aclear view of the struc- 
ture of the country, one of much interest to the students of that science ; 
but it is only incidentally that it concerns the objects treated of in our 
Journal The climatology and lithology will be read with pleasure by 
botanists (if such there be) who do not care for geology. A full account 
is given of the climate and its apparent causes ; especially noticing the 
effects of the presence of two ranges of lofty hills forming the eas 
and western parts of North Yorkshire. We have been much interested 
by the statements concerning the elevations at which particular crops 
can be grown with advantage, and of the plants grown most success- 
fully in the more elevated gardens. The highest Hawthorn hedge is at 
about 350 yards of elevation above the sea; but, such fences are com- 
paratively rare above 200 or 250 yards. Wheat is very little grown at 
above 200 yards of elevation; the highest field of that grain known to 
the author was a little under 300 yards, above which level it so rarely 
