Chapter  I.

Chapter  II.
Chapter III.

Chapter IV.

Chapter  V.
Chapter VI.

Chapter VII.

Chapter VIII.
Appendix.
 

TABLE OF CONTENTS

PAGE

History of Investigations of the Effect of In¬
door and Outdoor Atmospheric Conditions.      1

General Method of the Humidity Experiment.   27

The Effect of Humidity upon Comfort, Tem¬
perature and Pulse.....................    37

The Effect of Humidity upon Average Per¬
formance and upon Average Improvement
from Morning to Afternoon.............    40

Correlations Among the Tests.............    56

The Practice Effect During a Fortnight and
Variations in Efficiency During the Work¬
ing Day..............................    66

The Tests in the Light of Experimental Evi¬
dence ................................    79

Summary and Conclusions................    84

Instructions to Subjects..................    86

Chronology of the Experiment............    92

Physical   Conditions   in   the   Experimental

Room................................    92