89 
3. Leaves kept perfectly dry can hardly be injured by the arsenites, even 
when they are applied very abundantly. — 
4. Applications made in the heat of the day and in the bright sunlight do 
not injure foliage more than when applied in the cool of the day. 
6. The only effect of a heavy rain or dashing shower following an applica- 
tion of one of the arsenites is to lessen the injury to foliage. 
6. Leaves suffering from a fungous disease are more susceptible to injury 
than are healthy leaves. 
7. When freshly mixed and applied, London purple is most and white 
arsenic is least injurious to foliage. 
8. White arsenic in solution should not be used wpon foliage without first 
adding lime, Bordeaux mixture or some other substance to prevent its injurious 
effects wpon foliage. . 
9. White arsenic, if ollowed to stand many days in water before being 
applied, will do fur greater harm to foliage than if applied as soon as mixed 
10. Lime added to London purple or Paris green in water greatly lessens 
the injury that these poisons would otherwise do to foliage. 
11. Lime added toa mixture of white arsenic in water will greatly in- 
crease the injury that this poison would otherwise do to foliage. IPf the arsenic 
as all in solution, the lime witl then lessen the injury, as in the case of London 
purple or Paris green. 
12, London purple (Paris green and white arsenic have not yet been 
tried) can be used. at least, eight or ten times as strong without injury to foliage 
if applied in common Bordeaux mixture instead of water. 
I3. The arsenites cannot by any ordinary method be successfully mixed im 
a kerosene emulsion. 
14. The arsenites mix readily in resin compounds and do not seem to be 
more injurious to foliage than as ordinarily applied in water. 
15. The arsenites in strong soapy mixtures do considerably more damage 
to foliage than when applied in water only. 
16. The arsenites mix readily in carbonate of copper solution and do not 
seem to do more harm than when applied in water only. 
17. London purple in sulphate of copper solution does vastly more harm 
than when applied vn water only. 
Honry BrEES AND ARSENICALS USED AS SprAys.—Mr. H. O. Kruschke, of 
Juneau county, Wisconsin, in the American Garden for January, 1890, p. 57, 
warns prospective sprayers that the first man caught applying arsenic to trees in 
full bloom will be prosecuted—reasoning that the spraying of such trees will result 
in the storage by the bees of poisoned honey, the consumption of which will be 
dangerous. 
In our Report for last year, (1889, page 87) we quoted from Insect Life an 
account from Prof. Webster of the spraying of fruit trees without any ill results 
to either bees or honey. “The prevailing belief,” says Insect Life, “is, however, 
the other way, and cases are on record where serious destruction of bees has 
resulted from spraying. In the case of the apple, particularly, the application 
should not be made until the bloom has begun to fall, when no injury will be 
