680 
ON EARLY (ESTRUM IN THE HEIFER. 
for that purpose: I refrained from using it in these instances, 
because I particularly wished to give the blisters a fair trial. In 
another case it is very probable that I should employ it, and that 
extensively too; for in treating this complaint every effort should 
be made to tranquillise the system. I have found great benefit 
before now in employing tobacco clysters for this purpose. 
My object in producing the present paper, is not to attempt 
to throw every other medicine overboard except the one I have 
recommended. In my short practice, I have observed this one 
common fate attend all specific medicines of the kind—medi¬ 
cines which might otherwise be of infinite service in many cases, 
by attracting the attention of the public, are employed on all 
occasions, and produce frequent disappointments, and gradu¬ 
ally fall into disuse. The operations and effects of remedies are 
not absolutely inherent in themselves, but depend upon the 
mutual action and re-action of the body and medicines upon 
each other; hence the various effects of the same medicine on 
the same kind of disease in different patients, and in the same 
patient at different times. 
ON EARLY (ESTRUM AND IMPREGNATION IN THE 
HEIFER. 
the Reu. Henry Berry, Conductor of the British Farmei^'s 
Magazine^ 
I OBSERVE in the October Number of The Veterinarian, 
a communication respecting a case of early and frequent oestrum 
in a heifer, which the writer considers extraordinary, and which 
I conclude, from the nature of Mr. Dick’s remarks, has seldom 
occurred to him. 
You have encouraged me to hope any information on such 
topics may be useful ; and I therefore beg leave to state that, 
I this year lost an improved short-horned heifer from the injury 
experienced in extracting a calf at a period when the dam was 
only thirteen months old. The bull’s access to her at such an 
early period was, of course, accidental; but the circumstance of 
calves seeking the bull at this early age is quite common in my 
stock, most particularly if the calves b^allowed to suck the dam. 
Strange through the circumstance may seem, I find them more 
susceptible of impregnation at a very early age than when more 
matured; and, still more strange, my late but frequent experi¬ 
ence has been derived from cases where the calves, unmange- 
able under these circumstances, have obtained access to a par- 
