5. Caves, Cellars and Houses 



Cellars, caves, and abandoned mines, or specially constructed 

 houses are used for growing mushrooms, bepause in such places 

 only can the conditions of temperature and moisture be best regu- 

 lated. Cold is less injurious to mushroom beds than heat. The 



former renders the bed for a time unproductive; but the latter 

 stimulates the spawn to too rapid growth, which is usually fol- 

 lowed by the production of unsalable mushrooms, or by the eventual 

 death of the spawn, supposedly by damping off. 



