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A. J. Campbell A. J. V. Underwood Africa High Commission African Industrial Research Agricultural alkaloids analyses ANNUAL REPORT assay Assistant B.Sc beans boiler bricks calcination carried cement cent chemical Chemist citric acid clay clinker coffee colour commercial considerable diatomite dried drier drying EAARI EAST AFRICAN INDUSTRIAL engines experiments extraction factory fermentation fibre firing fuel furnace glaze H. B. Stent heating hecogenin improvement Industrial Research Board investigation Kenya kyanite laboratory lime M. G. Edwards M.Sc Management Board manufacture material meerschaum method moisture content mucilage Nairobi obtained onion flavour operation Papain plant possible pottery problem production propionic acid pulp pyrethrins pyrethrum ratio refractories rock phosphate rotary kiln samples satisfactory scale Scientific Officer silica sisal sisal waste soda ash sodium sodium silicate soluble solvent staff studio pottery suitable Tanganyika Technical Pamphlet temperature tests tiles Totaquina trials Uganda United Kingdom