176 The Philippine Journal of Science 
A second experiment was made from the 13th to the 21st of May with 
a more virulent virus which had been transmitted through from 74 to 
87 grasshoppers. Ninety-three liters of bouillon were sprayed with the 
apparatus of vermorel [Vermell?] over an area of about 80 acres. On 
the 28th of May very large numbers of dead grasshoppers were observed 
averaging about 5 grasshoppers per square meter of area sprayed along 
the course of a brook which probably arrested the advance of the column 
for some time; the bodies of insects were piled up in heaps. 
On the other side of the ravine through which the brook flowed a field 
of wheat was occupied by the column among which grasshoppers were 
captured whose intestines contained the bacillus d’Herelle but which showed 
no sign of sickness. 
The grasshoppers located in the field of grain were observed during 
three weeks prior to a further flight which could not be followed. Every 
morning considerable numbers of dead grasshoppers were found but no 
noticeable diminution in number of living grasshoppers could be observed. 
It would appear that when part of a column of grasshoppers is infected 
by spraying area over which column passes further infection ensues owing 
to the dejections of diseased insects. The experiments made tend to show 
that infection is not spread by contact or by the eating of dead bodies. 
It was admitted by Professor Sergent that the results so far obtained 
with the bacillus d’Herelle were less satisfactory than the results obtained 
by other methods of destruction currently employed. 
It was ascertained from Professor Trabut, the Director of the Botanical 
Service of Algeria, that the report of Professor Vermell, the Government 
Professor of Agriculture of the Department of Oran, who observed the 
field tests was decidedly unfavorable and that he himself considered the 
tests so far made to be inconclusive. 
No experiments have been made in Algeria on locusts with the bacillus 
d’Herelle as no locusts have been found in the country since investigations 
were first commenced. 
DEAN B. MASON, 
American Consul. 
ALGIERS, ALGERIA, May 2d, 1914. 
AMERICAN CONSULATE, 
Algiers, Algeria, May 2, 1914. 
Subject: Transmission of report on Experiments in Algeria in destroying 
grasshoppers with the Coccobacillus acridorium d’Herrelle. 
The Honorable the SECRETARY OF STATE, 
Washington. 
Sir: Referring to Department cable of April 28th directing that a brief 
report be made by cable as to the results obtained with the locust bacillus 
d’Herrelle and to the reply of this Consulate stating that experiments 
have not been made on locust and that results with grasshoppers were 
inconclusive I have the honor to submit herewith a more detailed report 
as to the experiments that have been made in Algeria with the Coccobacillus 
acridorium d’Herelle. 
I have the honor to be, sir, 
Your obedient servant, DEAN B. MASON, 
American Consul. 
Inclosure: Report in triplicate. 
