98 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



p. m.; Rock Branch, 8:40 p. m. ; Onawa, 9:15 P. m. ; Emmetsburg, 



night; Concord, 7:00 P. m. ; Tabor, 4:30 a. m. of the 13th; Mo- 

 nona, before daylight; Bancroft, night; Stacy ville, 5:00 a. m. ; Ft. 

 Madison, 6:30 a. m. ; Davenport, 10:40 A. m. ; Hopkinton, 11:00 

 A. m. ; Clinton. 11:30 a. m. ; Mt. Pleasant, 1:00 p. m., 13th; Albia, 

 1:45 P. M. ; Brush Creek, 3:40 p. M. ; Mt. Pleasant (second storm), 

 6:30 p. M. ; Middle River, 7:20 p. M. ; Cedar Rapids, 8:50 P. m. 

 There was little wind. Ft. Madison reports "6" (?); Emmetsburg, 

 Concord, and Bancroft report "3." "Lightning struck barn near Den- 

 mark, burning it with all its contents." 



August 17th. A few local storms. One in northeastern Iowa is 

 reported as beginning at Stacyville at 11:35 A - M - '■> Cresco, 12:00 m. ; 

 Brush Creek, 2:00 p. M. Reports from Middle River, 11:40 a. m. ; 

 Des Moines, 2:20 p. m. ; Dysart, 2:33 p. m. ; Monticello, 4:00 p. M. ; 

 Amana, 4:20 p. m. ; Homestead, 4:40 p. m., and Davenport, 5:55 

 p. m., harmonize fairly. Notes: Davenport — "Dust-storm, then calm." 

 Dysart — "Sometimes thunder-clouds rise fairly in the west, and then 

 divide, one portion swinging down Wolf Creek, and the other off to 

 Iowa River." 



August 19th. Reports inharmonious. In the early morning, at Ft. 

 Dodge and Auburn, a storm is reported. Most, however, began in the 

 evening and night, and some continued on into the 20th. There is a 

 storm in the early morning of the 20th, between midnight and 6:00 

 o'clock, reported from nearly every part of the State. Wind at Ft. 

 Dodge and Kiron, with force of "4;" at Smithland and Onawa, "3;" 

 in all other parts of the State, light. Very little rainfall anywhere 

 — 0.50 inch at Kiron, 0.25 at Ft. Dodge, 0.23 at Smithland, and 

 0.15 at Onawa, being the heaviest. Afternoon and night storms arc- 

 reported from four scattered stations. At Bancroft, "two persons riding 

 on a horse-rake were killed by lightning at 2 :3o p. m." 



In concluding this very imperfect report, I may call attention to a 

 few facts shown by the above : 



First. In Iowa we have at least three well-defined varieties of sum- 

 mer thunder-storms. 



Second. Our "heat-storms" generally come between 4:00 P. m. and 

 midnight, but often have a later installment, which comes in the early 

 morning. 



Third. Local thunder-storms this year show very little wind. Fre- 

 quently a calm may accompany a storm of some severity. 



