( 307 ) 



temperature fluctuation suras are expressed in entire degrees. The 



result follows here: 



GRONINGEN 1891-1905. 



Among 12 eases there is concordance in -t. discrepancy in 7 cases, 

 so that in this way no relation between tin' temperature-fluctuations from 

 dav to day and the fluctuations of the mortality of infants is shown. 

 Also the annual range of the mean amplitude of the temperature- 

 fluctuations from day to dav has another character than that of the 

 frequency of high temperatures: the maximum of the temperature- 

 fluctuations falls in June, not in August. Therefore we thought it 

 useless to separately investigate the large or the diurn temperature- 

 fluctuations. 



7. In concluding our investigation we are well aware that it is 

 far from complete and leaves room for various questions. If we 

 succeeded in convincing the reader that one of the prominent causes 

 of increased mortality of infants is an increase of the number of 

 very hot days, we express a hope that others, may it he competent 

 in medical matters, will feel inclined to trace the more direct 

 relations, to explain the different character of the phenomenon in 

 various parts of the country, perhaps with the aid of other tem- 

 perature limits and other shifts. The data the Meteorological Institute 

 is able to furnish for this purpose, also concerning other elements 

 than temperature, will readily lie put at the disposal of the future 

 investigator. 



The results obtained so far may he summed up as follows: 

 1 st . The fluctuations of the mortality of infants bear hardly any 

 relation to those of the mean monthly temperatures in the same 

 months, neither with those of the mean amplitude of the temperature- 

 fluctuations from dav to dav. 



')w\ 



if days with maximum temperature above 



20* 



