106 
ox. 
c 
to be treated and used with tlie precautions and care mentioned at 
p. 97. 
In the above observations I am only speaking of the London-purple 
in the powder form, used in the same manner as Paris-green powder 
or paste. Looking at the great mass of evidence attainable in U.S.A. 
Reports for many years, and other sources, it appears to me that there 
have been many failures, and sometimes direct injury caused, these 
failures often to be attributed to the strength of the “ purple” being 
not known, also the operator not having proper apparatus, and also 
being altogether careless in learning how to apply the spray or to 
experiment on a tree or so, before proceeding to broadscale work. 
On the other hand, there has been such thoroughly good success, 
showing what can be done with proper care, that it would be very 
desirable for further trial to be made with details duly noted, of 
strength of powder, proportion used, nature of sprayer with which 
applied, and results. 
Any details which it is in my power to furnish, I shall give with 
pleasure ; and I should fail in courtesy if I did not express my thanks 
to the heads and managers of the different great firms whose names I 
have mentioned, for the prompt and courteous attention with which 
they have uniformly replied to all my enquiries. 
ox. 
Ox Warble. Hxjyoderma bovis , De Geer. 
1 3 
1, Ox Warble Fly; 2, maggot; 3, chrysalis. 
During the past year, there has again been much application for 
information as to the best methods of prevention and remedy of 
Warble attack ; and (also as in previous years) the enormous and 
perfectly unnecessary loss caused to tanners and hide firms, to 
butchers and farmers, by this most unnecessary attack, has again 
been brought strongly forward by those interested. But still the 
difficulty remains of getting the information home to those immediately 
interested about the cattle, and to those in out-of-the-way districts, 
who, having no means of hearing of advance of knowledge of the nature 
$ 
