Sentence:  Cows are also more liable to congestion of the lungs and to tuberculosis than are other cattle. The former may be induced by being kept in <WSD>overclose</WSD>, hot, and badly ventilated houses, rendering them liable to chills when turned out; and there is no doubt tuberculosis is largely spread by the presence of infected animals in such houses. 
Meaning of the word marked with <WSD> tags:  Lacking adequate ventilation; stuffy.