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Gas treatment for scale insects; treating of the operations of the Horticultural Board's fumigating outfit, the applicability of the fumigation process in Cape Colony, and embodying a full description of the equipment necessary for fumigation with hydrocyanic acid gas — Illustration, Page 19
Fumigation↗
Gas treatment for scale insects; treating of the operations of the Horticultural Board's fumigating outfit, the applicability of the fumigation process in Cape Colony, and embodying a full description of the equipment necessary for fumigation with hydrocyanic acid gas — Illustration, Page 22
Fumigation↗
Gas treatment for scale insects; treating of the operations of the Horticultural Board's fumigating outfit, the applicability of the fumigation process in Cape Colony, and embodying a full description of the equipment necessary for fumigation with hydrocyanic acid gas — Illustration, Page 28
Fumigation↗
Gas treatment for scale insects; treating of the operations of the Horticultural Board's fumigating outfit, the applicability of the fumigation process in Cape Colony, and embodying a full description of the equipment necessary for fumigation with hydrocyanic acid gas — Illustration, Page 15
Fumigation↗
Gas treatment for scale insects; treating of the operations of the Horticultural Board's fumigating outfit, the applicability of the fumigation process in Cape Colony, and embodying a full description of the equipment necessary for fumigation with hydrocyanic acid gas — Illustration, Page 13
Fumigation↗
Gas treatment for scale insects; treating of the operations of the Horticultural Board's fumigating outfit, the applicability of the fumigation process in Cape Colony, and embodying a full description of the equipment necessary for fumigation with hydrocyanic acid gas — Illustration, Page 11
Fumigation↗
Gas treatment for scale insects; treating of the operations of the Horticultural Board's fumigating outfit, the applicability of the fumigation process in Cape Colony, and embodying a full description of the equipment necessary for fumigation with hydrocyanic acid gas — Illustration, Page 8
Fumigation↗