 | Ontario. Legislative Assembly - 1899 - 964 páginas
...may be on other lots than those on which the nursery stock are growing. 4. The fumigation is to bo by hydrocyanic acid gas produced according to the...fumigation is to be continued for a period of not less than forty- five minutes. After the expiration of this time or longer, and when fumigation is complete,... | |
 | Ontario. Legislative Assembly - 1901 - 698 páginas
...the fumigation house may be on other lots than those on which the nursery stuck are growing. 4. The fumigation is to be by hydrocyanic acid gas produced...instructions of the Inspector and from such formulas at he prescribes for the purpose. 5. The fumigation is to be continued for a period of not less than... | |
 | Ontario. Legislative Assembly - 1904 - 596 páginas
...flu? fumigation house may be on other lots than those on which the nursery stock are growing. 4. The fumigation is to be .by hydrocyanic acid gas, produced...to the instructions of the Inspector, and from such formula as he prescribes for the purpose. 5. The fumigation is to be continued for a period of not... | |
 | Canada. Experimental Farms Service - 1912 - 102 páginas
...the fumigation house may be on other lots than those on which the nursery stock is growing. 4. The fumigation is to be by hydrocyanic acid gas, produced...to the instructions of the inspector, and from such formula as he prescribes for the purpose. 6. The fumigation is to be continued for a period of not... | |
 | 1912 - 428 páginas
...the fumigation house may be on other lots than those on which the nursery stock is growing. 4. The fumigation is to be by hydrocyanic acid gas, produced...to the instructions of the inspector, and from such formula as he prescribes! for the purpose. 5. The fumigation is to be continued for a period of not... | |
 | Canada. Division of Entomology - 1912 - 656 páginas
...the fumigation house may be on other lots than those on which the nursery stock is growing. 4. The fumigation is to be by hydrocyanic acid gas, produced...to the instructions of the inspector, and from such formula as he prescribes for the purpose. 6. The fumigation is to be continued for a period of not... | |
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Inspector and from such formulas as he prescribes for the purpose. 5. The fumigation is to be continued for a period of not less than forty-five minutes. After the expiration of this time, or longer, and when fumigation is complete, the house is to be... 