• Subject index 

  Anonymous; Du Toit, P.J. (Pretoria : The Government Printer, 1941)
• Author index 

  Anonymous; Du Toit, P.J. (Pretoria : The Government Printer, 1941)
• Studies on the basic characteristics of South African Merino wool IV. Scaliness 

  Bosman, V.; Van Wyk, C.M.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  A study of the scaliness of South African Merino wool samples showed that the percentage differences in friction between the two directions varied from 3.0 per cent. to 130 per cent. At 70 per cent. relative humidity ...
• Growth of the Albino rat with special reference to the influence of environment 

  Murray, G.N.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  Observations were made on Albino rats over a period of four years (1933-37); 238 litters were obtained comprising 2043 young at birth; 1789 (872 males and 917 females) were reared and weighed weekly. PRENATAL GROWTH. (a) ...
• A note on the influence of a bloodmeal ration on porphyrin excretion in normal bovines 

  Roets, G.C.S.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  Results are presented showing the effect of dietary bloodmeal on the porphyrin excretion of four mature normal steers. Bloodmeal causes a higher excretion in the faeces of copro- and chloroform soluble porphyrins. The ...
• A preliminary note on the temperature of the scrotal skin of the bull and its relation to air, skin, and body temperature 

  Quinlan, J.; Riemerschmid, G.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  (1) The scrotal, skin, and body temperatures of a Sussex bull have been measured in the open during the period 7.1.41 to 27.3.41, at a range of air temperature of 26.4°F., i.e., from 64.8°F. to 91.2°F. (2) There was a ...
• Observations on artificial insemination of sheep with fresh and stored semen 

  Quinlan, J.; Steyn, H.P.; De Vos, D.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  (1) One hundred and ninety-six merino sheep, maintained under dry lot conditions, were submitted to artificial insemination with fresh and stored semen obtained from highly fertile merino rams. The resulting pregnancies ...
• Sex-physiology of sheep. Studies on the nature of the onset of oestrus in ewes following a period of sexual inactivity 

  Quinlan, J.; Steyn, H.P.; De Vos, D.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  1. Ninety-nine maiden Merino ewes, between the ages of 27 and 33 months, kept in an enforced environment in "dry lot" were submitted to a 3 hourly test for oestrus, from 6 p.m. to 6 a.m., at the commencement of the usual ...
• Bionomic studies on cattle in the semi-arid regions of the Union of South Africa. IV. The ovarian cycle of heifers during summer 

  Quinlan, J.; Bisschop, J.H.R.; Adelaar, T.F.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  (a) To obtain information concerning the sexual activity of cattle under the environmental conditions prevailing in the north western, semi-arid, summer rainfall areas of the Union of South Africa, a series of sex-physiological ...
• The carotene content of some South African feeds 

  Myburgh, S.J.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  1. Carotene values were determined by analysing veldgrass samples, collected monthly in the areas, Onderstepoort (Pretoria district), Ermelo (Transvaal Highlands) and Vryburg (Bechuanaland). 2. From the values for Carotene ...
• The nutritive value of animal proteins : the biological values of fishmeal, whale and fishmeal, meatmeal, meat and bonemeal, crayfishmeal, and white fishmeal 

  Du Toit, B.A.; Smuts, D.B.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  By means of nitrogen metabolism experiments, the biological values of 94 for white fishmeal, 81 for crayfishmeal, 71 for fishmeal, 67 for meatmeal, 67 for meat and bonemeal and 63 for whale and fishmeal were determined. ...
• A study on the possibility of cystine synthesis in the rumen of sheep together with the effect of cystine supplementation on the nitrogen utilization of lucerne in young stock 

  Smuts, D.B.; Du Toit, B.A.; Van der Wath, J.G.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  By means of metabolism experiments on rats it was shown that the biological value of the rumen ingesta is better than that of lucerne. When rumen ingesta are supplemented by cystine their biological value is significantly ...
• The endogenous nitrogen metabolism of pigs with special reference to the maintenance protein requirement 

  Du Toit, B.A.; Smuts, D.B.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  The endogenous nitrogen metabolism of pigs have been measured and an equation evolved for the estimation of the maintenance protein requirements of pigs. The equation obtained is P=0.79 W·⁷³⁴, where P=protein in grams, and ...
• South African Senecio alkaloids. Part 5. Notes on Isatidine, Rosmarinine and Pterophine, and on the structure of their necines and necic acids 

  De Waal, H.L.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  1. Isatinecine has a pyrrole nucleus and has no tertiary nitrogen atom. It must, therefore have a secondary aminogroup. The pyrrollizidine structure applicable to the two senecio bases retronecine and platynecine is, ...
• Recent investigations into the toxicity of known and unknown poisonous plants in the Union of South Africa. XI 

  Steyn, D.G.; Van der Walt, S.J.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  The toxicity of sixteen plants was investigated. According to the available literature the following three plants were proved for the first time to be toxic: Senecio pterophorus DC; Kalanchoe paniculata Harv., Kalanchoe ...
• Description of a tick Rhipicephalus glabroscutatum, sp. nov., (Ixodidae) from the Karroo areas of the Union of South Africa 

  Du Toit, R.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  A new species of tick from domestic stock is described and figured belonging to the genus Rhipicephalus. It closely resembles R. oculatus, Neumann, a common species on hares in South Africa from which it may be distinguished ...
• Further studies on the antigenic structure of paratyphoid bacilli with special reference to three new species of Salmonella 

  Henning, M.W.; Rhodes, W.F.; Gordon-Johnstone, J.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  Three new species of Salmonella are described. 1. S. durban was obtained from an adult native woman suffering from dysentery. The antigenic formula allocated to it was IX-a, enx. 2. S. reading var. kaapstad was isolated ...
• The diagnosis of chronic streptococcus mastitis : reaction, chlorine, methylene blue and Hotis tests, and microscopic examination 

  Van Rensburg, S.W.J.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  (1) An account is given of the abnormal conditions which may be encountered in the bovine udder and its secretion in chronic streptococcus mastitis. It is pointed out that, on account of these different manifestations of ...
• The electrophoresis of the neurotropic virus of horsesickness and its neutralizing antibodies in low concentration 

  Polson, A.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  1. By means of a modified form of the moving boundary method of electrophoresis of Tiselius, it was found possible to measure the rate of migration as well as the isoelectric points of viruses and their neutralizing ...
• The particle size of African horsesickness virus as determined by ultrafiltration and ultracentrifugation 

  Polson, A.; Du Toit, P.J. (Pretoria : The Government Printer, 1941)

  (1) Details of the technique employed for the preparation of gradocol membranes are given together with the technique employed in the filtration of neurotropic horsesickness virus. (2) From data collected from the ...

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