86 



Lake Maxinkuckee, Physical and Biological Survey 



Temperatures: — The total number of temperature records for 

 April is 362, as follows : 90 for 1900, 1901, 1902 and 1903 each, 

 and 1 each for 1907 and 1909. 



The lowest temperature recorded was 18° on April 10, 1909. 

 The lowest recorded in years of full records was 25° on April 5, 

 1900, and again on April 4, 1903; the highest was 88° on April 

 29, 1900. The extremes were as follows: 



1900, 25° on April 5, and 88° on April 29; range 63°. 



1901, 30.1° on April 1, and 85.1° on April 30; range 55°. 



1902, 22° on April 8, and 86° on April 21; range 64°. 



1903, 25° on April 4, and 75° on April 12; range 50°. 



The temperature was at or below freezing as follows: In 

 April, 1900, at 6 a. m. on the 1st, 3d, 4th, 5th and 10th to 14th, 

 inclusive; at noon on the 11th; and at 6 p.m. on the 3d, 11th, and 

 13th. The temperature was freezing at 6 a. m. on 9 days, at noon 

 on one day, and at 6 p. m. on 3 days. 



In April, 1901, it was at or below freezing at 6 a.m. only on 

 the 1st, and at no time at noon or 6 p. m. 



In April, 1902, it was at or below freezing at 6 a. m. on the 1st, 

 2d, 3d, 4th, 7th and 8th; at noon on the 1st and 7th; and at 6 

 p. m. on the 1st, 7th and 8th. In this month it was down to 

 freezing on 6 days at 6 a. m., on only 2 days at noon, and on 3 

 days at 6 p. m. 



In April, 1903, the temperature was down to 30° at noon and 

 6 p. m. on the 3d; to 25° at 6 a. m., and 32° at noon and 6 p. m. 

 on the 4th, to 28° at 6 a.m. on the 5th, and to 32° at 6 a.m. on 

 the 23d. 



In April, 1909, when only one observation was recorded, it 

 was 18° at 6 a.m. on the 10th. 



The greatest daily range was as follows : 



April 26, 1900, from 46° to 77°, or 31°. 

 April 30, 1901, from 62.9° to 85.1°, or 22.2°. 

 April 21, 1902, from 48° to 86°, or 38°. 

 April 1, 27, and 28, 1903, from 40°, 40° and 50°, respectively, 

 to 60°, 60° and 70°, respectively, or 20°. 



