220 QUEENSLAND AGRICULTURAL JOURNAL. {1 Mar., 1899. 
Whether I shall succeed in this, I, of course, cannot tell. It may seem to 
you all rather visionary ; but most practical things begin that way, I think. Any- 
way, some observed facts seem encouraging : In the first place, 40 c.c. of ordinary 
recovered blood injected into ten bullocks early last year produced no marked 
reaction, and I have records of cases where much larger quantities have been 
injected. In one case an indignant owner wrote to me that recovered blood 
was no good because he had fairly pumped it into an old cow ad lib., without 
producing any effect. 
Then, again, as to an anti-toxin being present, though probably, in ordi- 
nary recovered blood, in quantities too small to be of much value when 
injected in practicable doses: I did thirty-two bulls for Mr. Archer last year on 
the same principle. I first sterilised recovered blood, and then injected 40 c.c. 
of it—in some cases at the same time that I inoculated them with ordinary 
recovered blood, in some cases a week before, and in some cases a week atter. 
Only one of the thirty-two died. And though the work had to be done in such 
a way as to be of small value for experimental purposes, the results were more 
satisfactory than those obtained by Mr. Archer when inoculating the same 
class of animals in the ordinary way, so that the plan seems worth following 
into the developments I have suggested. 
Using uniformly, for inoculation, blood taken during the acute stage of 
the fever, and injecting a standard dose foe all animals alike, we should have an 
element of certainty in our inoculating material. And having in reserve an 
enforced anti-toxic serum to be used simultaneously with virulent blood, at 
discretion according to circumstances, we should be able to graduate the 
reaction at pleasure. For we do not, of course, desire in any case to completely 
counteract the effects of the virulent blood. If we did so, we should get no 
reaction and no active immunity in the animals treated. For instance, in adult 
bulls, we should inject a comparatively large dose of the protective serum at 
the same time that we inoculated them with virulent blood, because of their 
great susceptibility; in aged milking cows and fat bullocks, somewhat less; 
and for the ordinary run of young stock I do not think any protective serum 
would be necessary—they can quite well stand, under favourable conditions, 
inoculation with acute fever blood. 
TEXAS FEVER. 
Tne following three articles on Texas fever were contributed to the Breeders’ 
Gazette, Chicago, by Dr. D. E. Salmon, V.S., D.V.M., Chief of the Burean of 
Animal Industry, Washington (U.S.A.). They contain in a short concise form 
a history of the means adopted in America to connect the ticks with Texas 
fever, and details of the most recent experiments in the direction of discover- 
ing an effective dip. 
The official reports of the Chicago Bureau of Animal Industry not being 
available to general readers here, and there being many in the colony who would 
highly appreciate these articles, Mr. P. R. Gordon, Chief Inspector of Stock, 
Queensland, suggested the advisability of publishing them 7 extensoin the Queens- 
land Agricultural Journal for the benefit of allinterested in the tick question, 
and especially for the benefit of those who are still sceptical on the teachings 
of the Department of Agriculture on the subject. 
TEXAS FEVER PROBLEMS.—I. 
For many years Texas fever has been a serious obstacle to the development 
and prosperity of the cattle industry in certain sections of the United States. 
It has made the marketing of cattle from the infected district a menace to the 
ceattle-owners of the remainder of the country, and its existence has been used 
as a reason for shutting American live meat out of foreign markets. A disease 
haying so many possibilities for evil, and which is enzootic in a large section of 
