Perspiration was very profuse.

Those who had to work a long time lost their appetites, became emaciated, and congestion of the lung and brain was observed.

The movements of the limbs were easier than in normal air, though afterward muscular and rheumatic pains were often observed.
The peculiar and extraordinary development of the remaining special senses when one of the number is lost has always been a matter of great interest.

Deaf people have always been remarkable for their acuteness of vision, touch, and smell.

Blind persons, again, almost invariably have the sense of hearing, touch, and what might be called the senses of location and temperature exquisitely developed.