378 



Reviews atid Book Xotices. 



pamphlet issued by Messrs. Henry Richardson & Co., of York, 

 the annual rainfall ranges from 24 inches at York to 61 inches 

 at Arncliffe, in Littondale. The eastern half of the tract is 

 made up of low-lying cultivated ground, with a few woods 

 interspersed. The upper limit of wheat cultivation is at 600-700 

 feet, and of cultivation other than wheat, at 1,000-1,100 feet. 

 The western half of the district includes a good deal of wood- 

 land and moorland. About Malham Tarn, at an elevation of 

 1,300 feet over limestone, Mr. Morrison planted a million trees, 

 of which only about fifty thousand have survived. The situation 

 is unsuitable for larch and Scotch fir, the trees which succeeded 

 best being sycamore, beech, birch, alder, thorn, wych elm, and 

 mountain ash. As in the previous paper, a list is given under 



Limestone Scars and Scar Wood at Kettlewell. 



each kind of locality of its characteristic plants. This district 

 affords, which the first did not, an excellent opportunity of 

 estimating the change in the vegetation caused by the presence 

 of limestone rock. As I said before these maps, with the 

 accompanying texts, represent a large amount of conscientious 

 hard work, and should be carefully studied by all who take an 

 interest in plant distribution. It is much to be hoped that the 

 committee appointed by the Yorkshire naturalists may be able 

 to extend the survey to other parts of the county. It is very 

 gratifying to find that arrangements have been made by 

 which separate copies of the maps, with accompanying papers, 

 can be easily procured at a moderate price, and that these 



Naturalist, 



