RECENT EXPERIMENTS IN THE MANURING 
OF POTATOES, 
During the past few years a considerable number of experi- 
inents in the manuring of potatoes have been conducted in 
connection with several of the collegiate centres of agricultural 
instruction in England and Scotland. Some of these experi- 
ments have been directed towards an investigation of the 
characteristics of some of the multitudinous varieties of pota- 
toes at present more or less extensively cultivated, with a view 
to determine their relative crop-producing powers, the ealing 
quality of their tubers, and other properties that affect the sum 
of their total value. The greater number of the experiments 
have, however, been designed with a view to the discovery of 
the most efficacious and most economical methods of manuring 
the potato crop, and it is with these only that itis proposed to 
deal in this article. The experiments which fali to be con- 
sidered were conducted in Cheshire, Yorkshire, Northumber- 
land, and Durham, and in a number of counties in the centre 
and south-west of Scotland. The experiments in Cheshire 
were carried out in the years 1898 and 1899 on the College 
Farm at Holmes Chapel, and the reports on them were 
written by Principal Gordon. Those in Northumberland 
were conducted in the same years by the Durham College of 
Science on the experimental farm at Cockle Park; while 
experiments were also carried out under the direction of the 
College on six farms in the county of Durham in the year 
1899. The details of these experiments are given in the 
reports prepared by Professor Somerville and members of 
his staff. The Yorkshire experiments were conducted in the 
same years on the College Farm at Garforth and on other 
farms in the county, and those of the year 1899 were designed 
and reported on by Professor J. R. Campbell. The Scotch 
