ME. W. W. SAUNDERS ON SOME WILD PEAUS. 
95 
the other hand, where there is at the present time a fairlj 
healthy, but only small crop growing, the application of those 
mineral constituents which most increase a healthy plant has 
been considerably less, but that of 'nitrogen has been greater 
than where there is the total failure. Nevertheless, on the por- 
tions where there has been the most liberal supply of those mineral 
constituents — potass, for example — there is at the present time 
considerably more growth than where there has been no such 
supply. 
Lastly, in regard to the attempts made to supply the fer- 
tilizing matters at a considerable depth below the surface, it is 
admitted that, for a time at least, the resulting physical condition 
of the soil and subsoil was not satisfactory ; though, even at 
present, indications are wanting that beneficial effects may even- 
tually follow. 
This brief record of many failures may be concluded by a quo- 
tation from a paper on the subject published by Mr. Lawes and 
myself some years ago : — 
" When land is not what is called * clover- sick,' the crop of 
clover may frequently be increased by top-dressings of manure 
containing potass and superphosphate of lime ; but the high 
price of salts of potass, and the uncertainty of the action of 
manures upon the crop, render the application of artificial ma- 
nures for clover a practice of doubtful economy. 
" When the land is what is called ' clover-sick,' none of the 
ordinary manures, whether * artificial ' or natural, can be relied 
upon to secure a crop. 
4 " So far as our present knowledge goes, the only means of in- 
suring a good crop of Eed Clover is to allow some years to elapse 
before repeating the crop upon the same land." 
IX. Notes on some Wild Pear-trees growing near Charlwood, 
Surrey. By W. Wilson Saunders, Esq., F.E.S. 
On the high ground west of Charlwood, Surrey, the Common 
Pear {Pyrus communis) occurs, apparently wild, in several locali- 
ties. The soil is stiff" clay, a portion of the great Wealden forma- 
tion lying between the lower G-reensand and the Hastings sands. 
The trees are to be found chiefly in hedgerows and in the outskirts 
of woods and thickets, many far removed from any dwelling, and 
where there is no probability of their having been planted. They 
