XII, B, 1 



Shaklee: Experimental Acclimatization 



11 



Table VII. — Weather conditions on December 1, 1911 {at Weather Bureau, 



0.3 kilometer away). 



Time. 



Black- 

 bulb 

 read- 

 ing. 



Wind. 



Rela- 

 tive 

 humid- 

 ity. 



Sunshine 



(heliograph 



reading). 



a. m. 



8.00 



9.00 



10.00 



11.00 



12.00 

 p. m. 

 1.00 

 2.00 

 3.00 

 4.00 



•c. 



40.5 

 >45.8 

 a 47. 8 



48.3 



• 46.7 



«51.7 



50.0 



a49.8 



836.1 



M.S. 



°C. 



7.31-11.01 



11.25-11.45 

 11.46-11.47 



1 12.05-2.45 

 3. 58- 4. 10 







2 5 

 5 



3 



5 



1 5 







2 



62.0 

 60.0 

 59.0 



54.0 



58.0 

 68.0 

 50.0 

 68.0 



" Interpolations, see Table II, footnote. 



From a comparison of these two tables it seems probable that 

 at 9 o'clock and at 10 o'clock in the forenoon and at 1 o'clock 

 in the afternoon on December 1 the conditions to which monkey 

 4 was subjected were as severe as those that produced the 

 deaths of monkeys 11 and 13 of Aron's series. If this be the 

 case, the few exposures of monkey 4 had already developed in 

 it a greatly increased capacity for resisting the evil influences of 

 the exposure to the tropical sun under the conditions named. 

 And although it is probable that the wounds in Aron's monkeys 

 reduced their resistance and that Aron's monkeys struggled more 

 because of the insertion of the thermocouple into these inflamed 

 wounds, it seems justifiable to draw the conclusion that No. 4 

 had already acquired considerable increase in its powers of 

 resistance, especially when it is remembered that it showed no 

 distress at all on this day, nor did it show on the following days 

 any evidences of having received any injury from this exposure. 

 Another possibility is that this monkey was an especially resist- 

 ant monkey. This does not seem probable, because similar 

 results were obtained with all the monkeys studied in this series 

 as is brought out below. 



The progress and degree of acclimatization. — The results of 

 this day's exposure gave me more hope of being able to learn, 

 by the use of the monkey, something about acclimatization, if 

 not to the sun's rays, at least to the combination of all the climatic 

 factors, including the heat from the ground. 



Exposures of this monkey were made on every sunny day 

 thereafter, except holidays, for five months. All the later ex- 



