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Browsing 1941 Onderstepoort Journal of Veterinary Science and Animal Industry, Volume 17, 1941 by Subject "Veterinary medicine"
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Cloete, J.H.L.; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
After giving a description of two instances of cervical ribs in bovines, these cases are considered in the light of various theories that have been advanced in explanation of such anomalies. It is concluded that both of ...
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Anonymous; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
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Groenewald, J.W.; Graf, H.; Clark, R.; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
The available literature is reviewed and where possible conclusions are drawn.
References are listed which deal either directly or indirectly with the question
of Pregnancy Disease of sheep.
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Groenewald, J.W.; Graf, H.; Bekker, P.M.; Malan, J.R.; Clark, R.; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
Undoubted cases of Domsiekte have been produced by suddenly cutting the ration of good conditioned heavily pregnant ewes. An identical condition has been set up in non-pregnant ewes but a much longer period on the poor ...
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Van der Walt, S.J.; Steyn, D.G.; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
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Quinlan, John; Myburgh, S.J.; De Vos, D.; Du Toit, P.J.
(Pretoria : The Government Printer, 1941)
(1) The pH of the vaginal secretion of mature merino ewes, measured during
oestrus, gave a mean value of 6·648, with a range of 5·85 to 7·40. During
mid-dioestrus the mean value was 6·694, with a range of 6·00 to 7·60. ...
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Van der Walt, S.J.; Steyn, D.G.; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
(1) Poisoning by completely spent carbide is very similar to poisoning by calcium hydroxide.
(2) So-called spent carbide may contain active carbide which, when ingested (moistened), will yield acetylene. Furthermore, other ...
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Van der Walt, S.J.; Steyn, D.G.; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
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Murray, G.N.; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
The ferret fits in immediately with its new environment as regards its sexual
cycle, when taken from the northern to the southern hemisphere. The animals
that were in anoestrum in England started breeding shortly after ...
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Van der Walt, S.J.; Steyn, D.G.; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
The toxicity of fourteen plants was investigated. According to the available literature
the following plants, viz., Mesembryanthemum angulatum Thunb.,
Kalanchoe rotundifolia Harv. and Urginea rubella Baker have for the ...
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Bosman, V.; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
The wool production and fleece analysis of 50 extremely plainbodied stud
ewes are given. The ewes were typical of the sheep of the stud (including the
stud rams) and were obtained from a breeder who had consistently bred ...
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Bosman, V.; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
The analysis of the fleece densities of a group of extremely plainbodied stud rams is given. The number of fibres growing per square inch of skin (shoulder) varies from 29,100 to 53,200 with a mean of 40,900. The fleece ...
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Van der Wath, J.G.; Myburgh, S.J.; Du Toit, P.J.
(Pretoria : The Government Printer, 1941)
(1) A technique is described for the preservation and counting of ruminal
infusoria.
(2) Reactions of specific infusoria as well as total infusorial populations
to changes in the diet of stable fed sheep were ...
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Riemerschmid, G.; Quin, J.I.; Du Toit, P.J.
(Pretoria : The Government Printer, 1941)
1. The effect of sunlight on sheep artificially photosensitised with eosin
and phylloerythrin was investigated. Glass filters were used to ascertain whether
any of those rays readily absorbed by these dye-stuffs produced ...
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Van Wyk, C.M.; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
The tensile strength of the wool grown on six regions on each of eight
sheep was determined. Significant differences between the regions were obtained.
In all eases the tensile strength of the belly wool was considerably ...
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Anonymous; Du Toit, P.J.
(Published by The Government Printer, Pretoria, 1941)
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Theiler, Gertrud; Du Toit, P.J.
(Pretoria : The Government Printer, 1941)
1. Neumann's (1913) description of the male of Ixodes alluaudi is enlarged
upon and the female, nymph and larva described for the first time.
2. It is shown that it is essentially a parasite of the shrew, which may, faut ...
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Van Rensburg, S.W.J.; Thorburn, J.A.; Du Toit, P.J.
(Pretoria : The Government Printer, 1941)
1. An account is given of the results obtained over periods of 14 and 12 months respectively from a scheme applied to two South African Friesland herds and aiming at the eradication of chronic streptococcus mastitis from ...