ECONOMIC CONSIDERATIONS 51 



foliage, the Bordeaux mixture was applied seven times 

 during the season at a total cost of $60, and as a result 

 less than one-tenth of i per cent, of the buds failed to 

 take. This year the same treatment was continued at an 

 additional expense of $60. Many of the buds have 

 made a growth of 10 feet during the season, and as the 

 block now stands it is worth fully $7000. From control 

 experiments and from the experience of previous years, 

 it is safe to say that this amount is fully double what the 

 trees would have been worth had they been left untreated. 

 These facts are sufficient, to bring out clearly the point 

 we wished to make, namely, that spraying for plant dis- 

 eases can be done at a handsome profit. In the light 

 of our present knowledge the work must be regarded as 

 a legitimate part of one's business. In other words, the 

 farmers, gardeners, and fruit-growers who neglect such 

 work at the present day are as much to blame for short 

 crops as those who fail to perfectly manure and cultivate 

 the soil.' 



SPRAYING 



There is a difference of opinion amongst experts as to 

 the relative efficacy of a very fine, as compared with a 

 somewhat coarse, spray. With cyclone and eddy-chamber 

 nozzles, it is possible to throw a spray so fine that it hangs 

 like a mist in the air and does not fall to the ground. 

 Such fine spray is best for indoor work, but it is not so well 

 adapted as a somewhat coarser spray for ordinary outdoor 

 operations, except when the material to be sprayed is low 

 and easily reached, in which case a fine spray is most 

 economical and effective, as there is less waste of material, 



