北海道産鑄物砂の研究並に小型銑鑄物の鑄肌改良に關する二,三の實驗(I)

抄録

After the chemical, physical and microscopic investigations on some foundry sands in Hakkaido, the author found the most appropriate mixingratio of sand. The outline of the experiments is as follows:
(1) Chemical components; silica is less, felspar and clay are more, therefore, its refractoriness is low.
(2) Fineness; sand-grade is less and silt-grade is more.
(3) Grain size: globublars are scarce generally.
(4) Mixing of sand; green sand 50%, silica powder 30% and sea sand 20%.