A plan, tested successfully for eight years, is to sprinkle the floor with fine unslaked lime, over which a layer of potatoes 4 or 5 inches in depth is spread. Then sprinkle again with lime, and add another layer of potatoes the same depth as before, and thus continue till the whole are disposed of. The lime used is about one fortieth part by measure of the potatoes.

Potatoes thus treated have never become infected with disease, and when disease was already existing it has not spread; besides which, the quality of the potatoes has been rather improved than otherwise by the treatment, especially where they were watery or waxy.