8 



The Philippine- Journal of Science 



1917 



minutes" when exposed to the Manila sun, even in the coolest 

 portion of the year,* and since this monkey did not die, though 

 exposed to the Manila sun for seven hours and twenty-four 

 minutes, it might be inferred that this day happened to be 

 exceptionally cool, much cooler than the days on which Aron's 

 monkeys died. On comparing the Weather Bureau records for 

 these days, however, the energy of the sun rays, to which this 

 monkey was exposed, was greater and the surrounding atmos- 

 phere was hotter than those to which Aron's monkeys were 

 exposed. The air temperature and the black-bulb readings are 

 given in Table IV. 



Table IV. — Relation of sun's rays and atmospheric temperature to the death 



of monkeys in the sun. 



Monkey 

 No. 



Date. 



Maxi- 

 mum 

 black- 

 bulb.* 



Air 

 tempera- 

 ture. 



Authority. 



Duration 

 of expo- 

 sures. 



Result. 



2 



11 



cl2 



18 



4 



1910. 

 Nov. 16 



1911. 

 Jan. 18 

 Jan. 18 

 Jan. 26 

 Nor. 29 



51.8 



43.3 

 47.3 

 42.4 

 51.7 



80.8 



29.8 



30.8 



28.8 



28.8-31.2 





//. m. 



38 



1 50 



40 



1 

 7 24 



Death. 



Do. 



Do. 



Do. 



No distress. 



dob 



dob __._ 



dod - _ 



Shaklee 





" Interpolations. For method, see footnote to Table 11. 

 b Aron, op. cit., p. 111. 

 ' Number 12 was shaved. 

 ^ Aron, op. cit., p. 114. 



From Table IV one might draw the conclusion that the energy 

 of the sun's rays is a relatively small factor among those that 

 combine to produce the monkey's death. It is seen from the 

 table that one monkey remained in the sun seven hours and 

 twenty-four minutes without any signs of distress and that four 

 other monkeys in the sun at the same temperature, or a lower 

 one, and in sun rays of equal or less energy, died in thirty-eight, 

 one hundred ten, forty, and sixty minutes, respectively. This 

 further emphasizes the importance of the conditions other than 

 the temperature of the atmosphere or energy of the sun's rays 

 which act upon the monkeys exposed in the way in which Aron 

 exposed his monkeys. The data given in Table V shows this 

 more clearly. 



Aron, This Journal, Sec. B (1911), 6, 110. 



