Chapter 1: Mine Ventilation An Overview
A number of the prints show ventilating methods that include diverting surface winds into the mouths of shafts, wooden centrifugal fans powered by men and horses, bellows for auxil iary ventilation and air doors. An example of one of Agricola''s prints is reproduced in Fig. Agricola was also well aware of the dangers of ''blackdamp'', air that has suffered from a reduc tion in oxygen content''miners are