104 The Canadian Horticulturist. 



Ammonia in Spraying Mixtures. 



61*S» Sir, — I would like to ask some of our chemisis what good is derived from the 

 ammonia which is used in mixing ammoniacal earconate of copper ! Has it any fungicidal 

 power? John Harkness, Irtna, Ont. 



Ammonia has no fungicidal power, and is quickly evaporated after being 

 applied to the trees. The only object in using it is to dissolve the carbonate of 

 copper in order that it may be easily mixed with the water. The use of 

 ammoniacal carbonate of copper is, however, being superseded by the Bordeaux 

 mixture in which the sulphate of copper is used, and ammonia is not necessary 

 to make the solution. 



An Evaporator. 



6lfi. Sir, — Would you kindly give me the name of some person to whom I could 

 apply for the setting up of an evaporator which would be capable of evaporating 15# 

 bushels of apples per day ? A. Funnell, Trenton, 



We would refer our correspondent to Mr. R. J. Graham, of Belleville, who 

 has had wide experience in handling evaporators. We know of no factory in 

 Ontario where evaporators, such as our correspondent requires, are made. 

 There are several American firms : The Trescott Manufacturing Co., Fairport, 

 N. Y. ; Tripp Bros., Sodus, N. Y. ; and The American Manufacturing Co., 

 Waynesboro', Pa. 



Potash for Fruit Trees. 



617. Sir, — Would it be advisable to apply potash to fruit trees, especially plums, 

 before they come into bearing, or would the trees not be able to use it to advantage if 

 applied before fruiting ? E. E. McNutt, Truro, N. S. 



Potash is useful to fruit trees at any stage of growth. It is one of the 

 principle elements entering into the growth of the tree, and its effect upon the 

 foliage and upon the general vigor of the orchard may be readily discerned. 

 We have found it useful in applying it to pear trees in increasing their 

 productiveness, as well as in increasing the size and excellence of the fruit. It 

 is of more benefit on light soils than on heavy soils. 



Salt as Manure. 



6 1 §. Sir,— Is salt of any value as a fertilizer for fruit trees, and, if so, what quantity 

 per tree ? A. SherringtoiJ, Walkerton. 



Salt is sometimes useful, but is not itself a fertilizer. The beneficial effects 

 sometimes apparent from its application to certain crops are due o the 



