282 



Prof. Blschof on the Temperature of 



Table — conthiued. 



We here find that the temperatures of these springs in the 

 months of October, November, and December 1835, and Ja- 

 nuary 1836, were altogether lower than during the same months 

 of 1834 and 1835. This lower temperature still shewed itself 

 even in June 1836. In general, these differences all increased 

 as the observations went on, and were greatest in January. 

 But as no observations were raade between January and June, 

 it is impossible to decide whether the differences continued to 

 increase still further in the following months. However, t ^a 

 observations in June prove that they afterwards decreased 

 again, and it may be expected that in the following months 

 tliey will altogether disappear, or perhaps even become nega- 

 tive, if the summer turns out very wai'ra. The maximum 

 differences in the springs Nos. 8, 14, and 18 (0°.99, VMi, and 

 1°.30), are nearly exactly in proportion to the differences be- 

 tween their yearly maxima and minima (2°.25, 2°.81, and S°.37), 

 as given by the above series, of observations, from August 

 1834 to August 1835. In other words, the influence of the 

 external temperature on springs, is smaller, the smaller the 

 yearly variations in the temperature of the springs are, that is 

 to say, the greater the depth from which they rise. However, 

 not one of these springs rises from a depth sufficiently great 

 for the influence of the external temperature to be entirely 



