215 
mandibulate insects, by poisoning ages the stomach, they have also 
== or less effect by contact, and we are strongly of the opinion (which 
we hope soon to verify) that this donibinatiod, for the first time recom- 
mended, will give the spray most lasting effect, and that the few insects 
which escape the direct spray will be - deltroyod as they subsequently 
leave their protecting retreats or hatch from eggs and crawl about the 
tre. Asa means of arresting the growth of the black-mould (which is, 
however, only the indirect consequence of the Coccid), so troublesome 
an accompaniment of de Icerya, a small proportion of sulphate of 
Just as there is now a g eat wastage of time and material in drenching 
a tree, so the spraying tidal most in vogue in California is also waste- 
The spra 
give this nozzle its popularity under the mistaken spraying notions 
which prevail, and to this we must add the = that, being a patented 
contrivance, it is well advertised and on the market 
he cyclone nozzle has not yet proper ‘trial to impress its advan- 
es, having scarcely been known prior to the en ce ments of Messrs. 
é * b oie 
the size of the outlet to be regulated by the force of the pump. There 
is no form of nozzle so simple and so easily adjustable to all purposes. 
alt adjusted to the rim worked from the centre of the tree, will 
envelop it in a perfect [o ting mist, which in a ve 
will imbue all Wer ts. For tall trees a more forcible direct 
spray might be sent from the end by substituting an ordinary jet and 
the wire extension whia is simply an extension tube screwed over the 
5 t 
gas, vapour, or fume be discovered that will rapidly kill all the insects 
without injuring the tree; virtues not easily combined in such subtile 
edia 
In Florida proper spraying has been found to be so effectual and 
satisfactory that no elaborate experiments in fumigating have been 
