• South African solar radiation survey 1937-38 

  Riemerschmid, G.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  The results of the physical measurement of the total amount of sun and sky radiation and the cooling temperature at 6 stations in the Union may be summarized as follows: A. Radiation. 1. How does the amount of radiation ...
• Subject Index 

  Anonymous; Du Toit, P.J. (Pretoria : The Government Printer, 1940)
• Author Index 

  Anonymous; Du Toit, P.J. (Pretoria : The Government Printer, 1940)
• Studies on the basic characteristics of South African merino wool. III. Moisture adsorption 

  Van Wyk, C.M.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  The adsorption of moisture at various relative humidities by ten samples representing different types of South African Merino wool was investigated. The samples differed significantly in absorptive powers. At 90 per cent. ...
• Studies on the basic characteristics of South African merino wool. II. Specific gravity 

  Van Wyk, C.M.; Nel, H.A.M.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  1. The specific gravity of 54 samples of South African Merino wool from various wool-growing areas was determined. Significant differences occurred among these samples. 2. The mean value was 1.3052 at 25°C., water at 4°C. ...
• Studies on the basic characteristics of South African merino wool. I. Breaking strength and tensile strength 

  Bosman, V.; Van Wyk, C.M.; Waterston, E.A.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  A series of South African Merino wool samples, representing wools from different parts of the Union, was analysed for breaking strength and tensile strength. The method of determination, using Doehner's instrument, ...
• Experimental osteodystrophic diseases in goats 

  Groenewald, J.W.; Thomas, A.D.; Du Toit, B.A.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  (1) Starvation proved to be an important factor in the development of bone atrophy in the case of two kids which received a ration low in calcium and high in phosphorus, where the CaO:P₂O₅ ratio was wide. (2) ...
• A method for preparing sections of bone without decalcification 

  Thomas, A.D.; Clark, R.; Schulz, K.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)
• The influence of oophorectomy on the performance of greyhound bitches 

  Quinlan, J.; Steyn, H.P.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  1. Thirty-six greyhound bitches between the ages of six and 12 months have been oophorectomised. 2. The oophorectomised bitches have never shown the psychological or clinical symptoms of "heat". 3. Two oophorectomised ...
• Recent investigations into the toxicity of known and unknown poisonous plants in the Union of South Africa, X 

  Van der Walt, S.J.; Steyn, D.G.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  The toxicity of 22 plants was investigated. According to the available literature the following five of these plants were proved for the first time to be toxic: Cryptolepis decidua N.E.Br., Cryptostemma calendulaceum R.Br., ...
• The Senecio alkaloids. Part IV. Platyphilline, the active principle of Senecio adnatus, D.C. 

  De Waal, H.L.; Tiedt, J.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  1. In this article are described the isolation of the alkaloid, platyphylline from Senecio adnatus D.C. as well as the preparation of some of its derivatives. 2. The alkaloid has the formula C₁₈H₂₅O₅N and its fission ...
• Senecio alkaloids. Part III. Chemical investigations upon the Senecio species responsible for "bread-poisoning". The isolation of senecionine from Senecio ilicifolius Thunb. and a new alkaloid "rosmarinine" from Senecio rosmarinifolius Linn 

  De Waal, H.L.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  I. Two of the main Senecio species responsible for "breadpoisoning" in human beings in the Cape South-Western districts, viz., S. ilicifolius Thunb. and S. rosmarinifolius Linn., have been chemically examined for their ...
• The amino acid deficiencies of certain plant proteins and the supplementary effect between plant proteins as measured by means of their biological values 

  Marais, J.S.C.; Smuts, D.B.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  The supplementary effect of methionine on lucerne, lysine on oats seed, cystine and methionine on peanutmeal, cystine on linseedmeal as well as the supplementary relationship between yellow maize and lucerne and of yellow ...
• The utilization of the protein of Somerset beans by rats and sheep 

  Smuts, D.B.; Marais, J.S.C.; Bonsma, J.C.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  By means of carefully controlled metabolism experiments it was shown that the biological value for Somerset beans with rats is 37, and that this value is significantly enhanced by the inclusion of 0.2 per cent. cystine. The ...
• The biological values of the proteins of oats, barley, wheatbran and pollard 

  Marais, J.S.C.; Smuts, D.B.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  The biological values and digestibilities of the proteins of whole oats seed, unpearled barley, wheatbran and pollard have been determined and a figure expressing the percentage utilizable protein calculated.
• The biological value of the proteins of maize and maize supplemented with lysine and tryptophane 

  Marais, J.S.C.; Smuts, D.B.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  1. The biological values of whole white maize and whole yellow maize are 76 ± 1.91 and 67 ± 0.98 at approximately 8 per cent. protein level. 2. The proteins of white maize are significantly better than that of yellow ...
• Supplementation of winter grazing in the Transvaal with special reference to the maintenance protein requirement of sheep 

  Smuts, D.B.; Marais, J.S.C.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  By means of metabolism experiments on mature and young sheep it was shown that approximately 81 grams of maize will supplement April grazing successfully in respect of protein if the energy requirements are satisfied. Due ...
• Rinderpest in buffaloes : the immunizing value of dried goat spleen vaccine 

  Pfaff, G.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  1. The dose of dried goat spleen vaccine has no influence on the reaction produced. 2. Immunity is not acquired by contact with reacting buffaloes. 3. Long-drawn-out reactions may be due to infection soon after ...
• Erosive stomatitis of cattle 

  Mason, J.H.; Neitz, W.O.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  1. A disease, erosive stomatitis of cattle, which has some resemblance to foot-and-mouth disease, is described. 2. It can be transmitted in series from bovine to bovine and is caused by a virus. 3. There is evidence ...
• The susceptibility of cattle to the virus of bluetongue 

  Mason, J.H.; Neitz, W.O.; Du Toit, P.J. (Pretoria : The Government Printer, 1940)

  (1) Bluetongue virus inoculated intravenously, subcutaneously, intranasally, or through scarifications on the buccal mucous membrane did not cause any apparent illness in cattle. (2) Inoculated cattle developed a maladie ...

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