11) Clear out personnel.
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12) Take over keys( every door key)
9. The strength of the gas and time required
For it to take effect depends on:
1) The type of vermin. 2) The temperature. 3) The amount of furniture in the rooms. 4) The imperviousness of the building.
For inside temperatures of more than 5 degrees Centigrade, it is customary to use 8 g. prussic acid per cbm.
Time needed to take effect: 16 hours, unless there are special circumstances such as a closedin type of building, which requires less time. If the weather is warm it is possible to reduce this to a minimum of 6 hours. The period is to be extended
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