47 
hole with earth and step on it to pack it down. Press down the pis- 
ton, and you are ready to treat die next plant. Never push the in 
jector in the ground unless the piston is clear down, because if the 
lower end is not thus closed it will immediately fill with soil, which 
is not easily removed. Study the drawings in figure 17 in connection 
with these directions and you will understand the reason for each 
step. We would advise that the reservoir be first filled with water 
and the injector operated above the ground until each step is thor- 
oughly understood. There is nothing complicated about the instru- 
ment, or the way it is to be operated. It can be easily taken apart 
and cleaned if necessary; the only caution to be observed in replac- 
ing the parts is to have the flanges of the leather in the upper valve 
turned upward. 
We recently tested the effect ot the liquid on some young cab- 
bage plants not yet large enough to set in the field. A tablespoou- 
ful of the liquid was applied beneath several plants with the injector. 
In a few minutes the odor of the liquid was very noticeable on the 
-surface around the plamts. These plants have not show'll any signs 
of injury from this large dose. As stated in the description of 
figure 17, the amount of liquid to be applied can be easily regulated. 
On small plants, a teaspoon ful will probably be sufficient. When 
the plants are well established in the field, and the maggots thick, 
use a tablespoonful. One application will usually suffice. The 
time to apply will be when the maggots are first discovered, early in 
May. Do not wait until the plants begin to wilt before making the 
application, for although it will then kill the insects, it will not re- 
invigorate the plant. 
We believe gardeners will find this the most practicable and 
most effective method of killing the Cabbage Root Maggot when it 
attacks cabbages and cauliflowers . — [ From Bulletin 78, />■ 581, Nov- 
ember, 189-}.] 
REMEDY FOR PHYLLOXERA. 
The introduction of American plants to replace those destroyed 
by parasites in French vineyards has not arrested the use of insecti- 
cides for the protection of French vines still attacked by Phylloxera, 
and for this purpose Carbon Bisulphide (either pure or dissolved in 
water), sulpho-carbonates and submersion continue to be employed 
with more or less success. The Carbon Bisulphide is by far the more 
efficient, but is too volatile and does not diffuse with sufficient rapid- 
ity. When, however, it is mixed with vaseline, its volatility is 
reduced and its diffusibility is increased, the former proving advan- 
tageous in light and calcareous soils, the latter in heavy soils, in 
accordance with theo-elical considerations. The vaselined sulphide 
