45 
vinced that to make the method practicable in the field, some 
method must be devised by which the liquid could be more quickly, 
safely and perhaps efficiently applied. 
It seemed as though some instrument might be, or possibly had 
already been , devised by which the liquid could be thus applied. 
We were unable to find any record of such an instrument having 
been devised in this country. The “Pal-injecteur” used in France 
is also too extremely heavy and clumsy, and very expensive. 
In fact, we believe the instrument can be ?- adapted as to. work 
satisfactorily wherever the liquid is now used against underground 
insects. For instance, it will facilitate the application of the liquid 
to the new Grape Root worm (Fidia viticida) which has recently 
appeared in Ohio ; and it is possible, as Prof. Cook suggested in 1880, 
that the Peach Borer (Sannina exitiosa) may be killed by the sub- 
stance, especially on small trees, where it works almost entirely on 
the roots (we shall try some experiments in this line in the spring). 
Many other instances might be mentioned where it would be prac- 
ticable to use the liquid, now that we have a suitable instrument to 
apply it. In fact, this simple and cheap injector should open up a 
whole field of experimentation with this liquid; why not use it 
against the root form of the Black Peach Aphis (discussed in Bulletin 
49) or the Wooly Aphis of the apple ? 
The liquid is very volatile and will thus quickly evaporate if left 
in an open or uncorked vessel ; we find large glass bottles with tight- 
fitting corks the best receptacles for it. The vapor is very poisonous 
and great care should be taken in pouring it out not to breathe much 
of it. As the vapor is also very explosive, no lights of any kind 
should be brought near when it is being used. Treat it with more 
care than you would gunpowder, in this respect. The best and 
cheapest brand now on the market is that known as “Fuma Carbon 
Bisulfide,” manufactured by Edward R. Taylor, Cleveland, Ohio. 
He ships it in 10 lb. cans at 12 cents per pound, or in 50 lb. cans at 
10 cents per pound. It can be obtained in small quantities at drug 
stores, but usually for not less than 25 cents per pound. 
Thus cabbage plants can be treated once, and once is usually 
sufficient, at the rate of about 10 plants for 1 cent for the liquid, using 
about 1 teaspoonful to each plant. As the injector will last for years, 
and several neighbors might join in the purchase and use of one in- 
strument, its cost would practically not influence this estimate of the 
cost of killing the maggots. We believe it is the cheapest, most 
effective, and most practicable method yet devised for fighting this 
pest on crops of cabbages and cauliflowers ; on crops of radishes, 
turnips, or onions, it will probably be too expensive, except where 
choice or new varieties are attacked. The Carbolic Acid Emulsion 
will prove the most practicable on these last crops. 
