52 
by experiments that the bran is much more attractive to the locusts 
than sugar is. Some persons informed me that they had used molasses 
in place of the sugar, aud with equally good results. A few had added 
a quantity of glycerin to the mixture in order to prevent it from dry- 
ing out and forming a solid mass that the locusts can not readily feed 
upon, but it is doubtful if this is any great improvement over the ordi- 
nary Avay. 
I met several persons who reported that they had not obtained sat- 
isfactory results by the use of this mixture, but I learned from them 
that they had used only 2 pounds of arsenic to 100 pounds of bran; 
this, of course, would make a very weak mixture, containing only one- 
eighth as much arsenic as it should have contained, and therefore it is 
not to be wondered at that it did not produce the same results as the 
stronger mixture would have done. The arsenic in this mixture is very 
slow in its actions upon the locusts. I have seen locusts feeding upon 
it quite early in the morning, and these were still alive in the evening, 
but died during the night. 
There has been some objection made to the use of this mixture on ac- 
count of the danger attending its use, but with only ordinary precautions 
no danger need be apprehended from it. Although it has been quite 
extensively used in various parts of this State during the last six years, 
still 1 have not learned of a single instance where human beings or 
domestic animals of any kind have been poisoned by it. It is advisable 
to prepare the mixture in a closed room in order to prevent the arsenic 
from being blown about by the wind, but after the mixture has once 
been thoroughly saturated with water there is no danger of its being 
blown about, nor is there any great danger of its being carried about 
upon the feet of birds or insects. Of course it shoidd never be placed 
within the reach of poultry or of domestic animals of any kind ; these, 
however, are seldom allowed to run in the orchards or vineyards, so 
that little or no additional trouble would result from the use of the 
poisoned mixture in such places. 
Several persons informed me that they had srjrayed their trees with 
Paris green and water at the rate of 1 pound of this poison to about 200 
gallons of water, but this did not deter the locusts from feeding upon 
the leaves of the trees thus sprayed; nor could it be discovered that 
any of the locusts had been destroyed by feeding upon the poisoned 
leaves. This is scarcely to be wondered at, since it would not be possi- 
ble in this manner to cause a sufficient quantity of the poison to adhere 
to the leaves without at the same time severely injuring the latter. A 
far better plan is to use the bran and arsenic mixture described above, 
as there is no danger of injuring the trees by its use. 
I was also informed that trees had been sprayed with various sub- 
stances to deter the locusts from feeding upon them, but all that I con- 
versed with upon this subject reported unsatisfactory results. The fol- 
lowing from the Folsom Weekly Telegraph of August 1, 1891, would 
