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Browsing 1941 Onderstepoort Journal of Veterinary Science and Animal Industry, Volume 17, 1941 by Type "Article"
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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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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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Riemerschmid, G.; Quinlan, John; Du Toit, P.J.
(Pretoria : The Government Printer, 1941)
1. The temperature of the scrotal surface has been recorded at various air-temperatures
within the range 10°C. to 40°C. (50°F. to 104°F.).
2. At low air-temperatures (10°C. to 25°C.) the temperature on areas I,
II, and ...
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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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Quinlan, John; Roux, L.L.; Van Aswegen, W.G.; De Lange, N.; Du Toit, P.J.
(Pretoria : The Government Printer, 1941)
(1) Ten female native goats were mated to, or artificially inseminated with
semen from a number of highly fertile sheep-rams during four breeding seasons.
(2) There was great difficulty in obtaining fertilisation, but ...
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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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Louw, J.G.; Du Toit, P.J.
(Pretoria : The Government Printer, 1941)
The structural constituents, natural cellulose, hemicelluloses and lignin, in
graminaceous food materials, faeces, and the crude fibre isolated from these have
been determined. The results showed that:
(1) crude fibre ...
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De Waal, H.L.; Pretorius, T.P.; Du Toit, P.J.
(Pretoria : The Government Printer, 1941)
(1) Senecio sceleratus sp. nov. 'Schweickerdt is an extremely toxic Senecio
species. It contains at least three more or less toxic alkaloids, viz., isatidine,
retrorsine and a new alkaloid, sceleratine,
(2) Sceleratine, ...
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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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Elder, J.S.; Du Toit, P.J.
(Pretoria : The Government Printer, 1941)
Details have been given of the construction of thermocouples suitable for
temperature measurements on skin surfaces and in living tissue. The sources of
error have been discussed, and tests of the accuracy of the method ...
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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 ...