206 



EXPERIMENT STATION RECORD. 



The year 1805 nave 144,411 calories. By means of silver-print paper, 

 which is more sensitive than the paper prepared with prussiateof iron, 

 the number of hours of sunshine are registered. The following table 

 shows the total number of horns of sunshine and the theoretical num- 

 ber — i. e. ? the number of hours between sunrise and sunset: 



Hours of sunshine at Jurisy in 1S96. 



Month. 



January. 

 February 

 March. . . 



April 



May .... 



June 



July 



Actual. 



in. 07 



77.40 

 92.23 

 121). SO 

 269. 00 

 191.15 

 212. 05 



Theoret- 

 ical. 



268. 04 

 280. 40 

 364. 30 

 407. 52 

 468. 29 

 476. 25 

 478. 57 



Month. 



August 



September , 



October 



November.. 

 December . . 



Total 



Actual. 



122. 50 

 120. 30 

 90.35 

 55. 40 

 25. 00 



1, 398. 35 



Theoret- 

 ical. 



436. 48 

 371.28 

 328. 38 

 269.16 

 251. 35 



4, 402. 72 



The proportion of hours of actual sunshine was but 32 per cent. 

 The greatest amount of sunshine occurred during May and the least 

 during January and December. In 1895 the register showed 1,817.15 

 hours of sunshine. 



TEMPERATURE OF THE AIR. 



The temperature of the air in the shade was observed and registered 

 daily by means of a standard thermometer and with maximum and 

 minimum thermometers. 



Average temperature of the air at Jurisy during 1896. 



Month. 



Average 

 for 24 

 hours. 



Average of 

 maximum 



and 

 minimum. 



Remarks. 



January . .... 



February 



March 



April , 



May 



June 



July 



August 



September ... 



October 



November 



December . 



Average 



Deg. C. 

 2.68 

 2.65 

 8.36 

 9.39 

 13.01 

 17.48 

 19.20 

 15.82 

 14.42 

 8.34 

 2.82 

 3.50 



9.80 



Deg. C. 

 2.76 

 2.82 

 8.60 

 9.97 

 12.62 

 17.50 

 18.80 

 15.91 

 15.00 

 8.82 

 3.13 

 3.74 



9. 98 



Mild. 

 Cold. 

 Warm. 

 Normal. 



Do. 

 Warm. 

 Very warm. 

 Cold. 

 Fresh and rainy. 



Do. 

 Cold. 

 Mild. 



If the average of 365 days of the year be taken, the annual tempera- 

 ture will be 9.84° instead of 9.80°. In 1896 January was very warm, 

 0.7° above the normal. February was very dry and relatively cold, 1° 

 below the normal. In conclusion, the winter was warm and the rain- 

 fall much less than normal. Spring was warm and dry. During May 

 the rainfall at Juvisy was only 3.2 mm., the smallest rainfall during 

 May for a century, except May 1880, when a lighter rainfall, 1 mm., 

 was recorded, with the same temperature. The drought was extreme 

 almost all over France and the harvest was threatened. During June 



