"The beds need sprinkling occasionally with tepid water, but should never be made very wet. Insects can largely be avoided by care in securing good manure and in having the premises well cleaned before the beds are made. When mushrooms are grown in successive years in the same place, the place should be given a very thorough cleaning during the summer. All manure and soil is removed, the beds are cleaned out well, and the walls and boards often whitewashed. It perhaps would be well also at this time thoroughly to disinfect the premises with a solution of formalin."