l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 8l 



element is much quicker and easier to use than the meHkeron. Also 

 it offers no difficulty in air currents where the melikeron becomes 

 unusable. 



Table G is a summary of this kind. The first trials with the water 

 jacketed melikeron indicated a minus correction (see page 8) when 

 the water jacket temperature was less than room temperature. The 

 water jacket temperatures are therefore given in all the tables and 

 the differences Room Temperature minus Water Jacket Tempera- 

 ture are recorded in table G. Examination discloses a rough equality 

 between the differences Melikeron minus Thermoelement and Room 

 Temperature minus Water Jacket Temperature. In the wall tem- 

 peratures no difference is noted between melikeron and thermo- 

 element — which is as we might expect since the wall is always close 

 to room temperature, and the melikeron reading is very small. In the 

 measurements at air velocities greater than 130 feet per minute there 

 is decided disagreement — which we know is due to the unsatisfactory 

 performance of the melikeron in air currents. Of the remaining ob- 

 servations, the difference Melikeron minus Thermoelement on the 

 skin is much larger than in any other group. For comparison, all the 

 other groups, viz., clothing, hair, shoes, and calorimeter, are united in 

 one group at the bottom. From the algebraic mean of Room T. minus 

 Water J. T. in this group. 



when Room T. minus Water J. T. = ?82, Melik. minus Therm. = ?8o 

 that is, the melikeron calculated temperature is in error by as much 

 as the water jacket differs in temperature from the wall. Hence we 

 may conclude that on the skin, when Room T. — Water J. T. = o, 



Melik.— Therm. = I Tqi - o°67 = I °24. 



Again from the arithmetical mean of Room T. — Water J. T., 



when Room T.— Water J. T.= i?i4, Mehk.— Therm. = °8o 



from which on the skin, when Room T. — Water J. T. = o, 



Melik.— Therm. = I foi- ^^ x°8o=i?oo 



1. 14 



A mean of all clothing, hair, shoes, and calorimeter (Melik. — Therm.) 

 differences whose (Room T. — Water J. T.) differences are less than 

 ifo gives 



No. of Melik-.— therm. Room T.— water J. T. 



observations difference difference (algebraic) 



30 °Si °39 



Calorimeter tests alone give 



8 .20 .24 



