i;4 DAVENPORT ACADEMY OF NAT! RAL SCIENCES. 



Rainfall generally very small. At Cresco 0.62 inch fell, and at Monti- 

 cello, nearly an inch. 



July 29th. Heat culminated. .Storms occur very early in the morn- 

 ing, perhaps continuation of the last. Evening storm began between 

 6 : 00 and 10:00 p. m. This was one of the worst storms of the season. 

 Albia reports: "Barometer falling this afternoon; thermometer ioi^° 

 at 3:00 o'clock, 101 at 2:00 o'clock, and 97 at 6:00 o'clock p. m." 

 We were to the southeast of a long "low" area over Dakota and 

 Nebraska on the morning of the 29th. This passed over Iowa during 

 the twenty-four hours following, and was to our east on the 30th. 

 Notes: Seney — "Lightning very fierce; struck an elevator here, and 

 knocked down and badly injured three workmen, at 2:00 P. m. ; storm- 

 ing, off and on, all day; no wind." Smithland — "Tree on river bank, 

 forty rods east, struck by lightning." Marion — "One inch rain; south- 

 west wind, '4.' " Algona — "House struck." Concord — "One cow killed, 

 fifteen miles southwest; three horses and two cattle killed for George 

 Clark, in Erin township ; hard to describe storm ; the severest we have 

 had, in wind, thunder and lightning; from commencement, at 3:30 p. 

 m., to 11:00 p. M., thunder could be heard at some point; lightning 

 continuous, and in all points; storm severest at 8:00 p. m ; rain at 

 3:30, 7:30, and 9:00 p. m. ; hot wind at 6:00 p. m. ; and before the 

 last rain, the clouds, coming from the southwest, were upper clouds." 

 Cresco — "Frequent and vivid lightning all evening, in all directions, 

 with occasional showers, until after midnight; very warm and close be- 

 fore storm; a severe squall from west-northwest at 6 : 10 p. m., accom- 

 panying first heavy rain, injuring wind-mills, tearing trees, etc." Algona 

 — "Second storm of day; worst of season; at 6 :3c p. M., terrific thunder 

 and lightning; storm went southeast, with a great roar; wind like a 

 gale." McGregor — "Very vivid lightning in the evening; wind changed 

 from southwest to northwest before the storm, being blown rapidly 

 across the sky; wind force, '4.'" Emmetsburg — "Clouds came up 

 from southwest and northwest, very black ; seemed to roll until they 

 came together, then changed to light, smoky color, and looked like 

 tornado; only a puff, however; the blackness gave way to light, and 

 settled down to a steady rain; when the two storms came together 

 there was a fearful commotion; it was a pretty sight." Algona — "Third 

 storm of the 29th, 9:00 p. m. ; this has been an electrical day; thun- 

 der all day; though not six hours apart, these are three distinct storms; 

 all the storms this year come from southwest; this is strange, and never 

 noticed here before during eighteen years." Cresco, Brush Creek, and 



