A STUDY OF BODY RADIATION 



By L. B. ALDRICH 



CONTENTS PAGE 



Introduction 



Dr. Abbot's experiments in 1921 ^ 



Preliminary experiments in still air 



Preliminary calorimeter experiments ^4 



Calorimeter tests with cloth walls ^ 



Relationship between melikeron and thermoelement results I7 



Experiments on ten subjects in still and in moving air I9 



General discussion 



Summary of results 



Notes on tables 



LIST OF TABLES 



PAGE 

 TABLE 



A Abbot-Benedict observations in 1921 -7 



Bi-io. Observations and results of preliminary experiments on ten subjects. 29 



C Observations and results of preliminary calorimeter tests 39 



D Observations and results of calorimeter tests with cloth walls 40 



El-io. Observations and results of experiments on ten subjects in still and m 



41 



movmg air 



F. Summary of cloth-covered calorimeter tests 5i 



G. Summary comparing thermoelement and melikeron 5i 



H. Summary of table E, varying air velocities 5^ 



J. Summary of table E, still air • • • 53 



K. Summary of changes in skin and clothing temperatures in moving air. . 54 



L. Condensed summary of tables B and E 54 



LIST OF TEXT FIGURES 



PAGE 

 FIGURE 



1. Melikeron and mounting 4 



2. Thermoelement device 



3. Thermoelement electrical connections 



A Bath for constant temperature junction 9 



10 



5. Calibrating bath 



6. Thermoelement calibration curve 



7. Sketch showing body position numbers ^^ 



8. Vertical and horizontal calorimeters ^5 



9. Diagram for computing solid angle exposed to melikeron 10 



Smithsonian Miscellaneous Collections, Vol. 81, No. 6 ^ 



