1883.] H. Warth — Air-temperature Sf humidity at different elevations. 83 



7. On the 11th of October, 1882, and on the 16th February, 1883, I 

 observed the temperatures in quick succession at both observatories early 

 before sunrise, continuing till after sunrise. These observations showed 

 me that when the ordinary thermometers were at their lowest points (short- 

 ly before sunrise) the minimum thermometers also were at their minimum 

 and the two kinds of minima thus obtained agreed with each other. After 

 these experiments it cannot for a moment be maintained that the remark- 

 able results, Especially with regard to the daily dry minima of the two 

 observatories, were owing to bad indications of the minimum thermometers. 



8. The following table shows the monthly means of observations at 

 the two observatories and the differences of minimum, maximum and daily 

 mean temperatures at both observatories ; 



