36 



and one from Harrisburg, in the southeast part, and in the same latitude with 

 Canonsburg. The cold first appears on the 25th, at Canonsburg and Fleming 

 early in the morning, and at Harrisburg in the forenoon. At the tw^o former 

 stations the mean temperature of the day was lower than on any previous day 

 of the month, and also at Harrisburg, except the 18th, Avhich was two-thirds of 

 a degree lower. At Canonsburg and Harrisbui-g the thermometer was lower at 

 2 p. m. on the 25th than at 7 a. m., and at Fleming it was only two degrees higher. 

 At all three of llie stations the 24th was among the warmest days of the month. 

 A light frost is reported at Canonsburg in low situations on the 26th, 27th, and 

 30th, and at Fleming on the 27th and 30th. 



Maryland. — At Sykesville, (the only place reported from,) the 24th was 

 among the warmest days of the month, and al)out 20 miles northwest of Baltimore, 

 the beginning of the cold Avas manifested late on the 25th. No frost is men- 

 tioned OM the register. The lowest tem^ierature recorded was 51, at 7 a. m. on 

 the 27th, and the day of lowest mean temperature was the 31st. 



New Jersey. — Two registers have been received from this State — one from New- 

 ark, on which f)nly the daily maximum and minimum observations are recorded ; 

 the other from Progress, on the Delaware river, some miles above Philadel- 

 phia. The cold began in the evening of the 25th. With a very few excep- 

 tions the morning of that day was the warmest of the month, and the morning 

 of the 26th colder than any day preceding it. Neither of the o1)servers record 

 any frost. 



New York. — The registers are from nine counties, lying on the western, 

 northern, and eastern boundaries, and in the central part of the State. There 

 are none from the southern tier of counties bordering on Pennsylvania. In the 

 western, central, and northern counties the cold was indicated e;ii]y in the morn- 

 ing of the 25th, the 7 a. m. observation on that day being the lowest to tlmt time 

 of the month in some of those counties, and among the lowest in them all; while 

 it began later in the same day in the two counties on Hudson river (Washington 

 and Dutchess,) the temperature on that morning, instead of the lowest, being 

 among the highest of the month at that hour, and falling in each of them ten 

 degrees from 7 a. m. to 2 p. m. The only frost registered was at Gouverneur, 

 Saint Lawrence county, on the 18th and 31st, and not sufficiently severe to 

 injure vegetation. 



New England. — In these States the morning of the 25th, or the preceding 

 night, was generally warm, and the decline of temperature began during that 

 day, or early in the morning of the 26th. A light frost is reported at Lunen- 

 burg, Vermont, on the 17th and 18th, and at Wilmington, in the same State, 

 on the 18th and '28th. 



Besides the depression of temperature during the latter part of August, a sim- 

 ilar period also distinctly appears on the registers about and previous to the 

 middle of the month. On the ISth, at the time of the morning observation, at 

 nearly all the stations from Maine to Illinois, the thermometer was lower than 

 on any other day until the cold towards the end of the month. 



THE EQUINOCTIAL STORM. 



The registers for September, 1863, exhibit three periods interesting for com- 

 parison : one near the beginning of the month, one about the middle, and one 

 towards the close. The most conspicuous of these was the rise of temperature 

 about the middle of the month and the subsequent fall, giving at all the stations 

 a decided elevation and depression, and at a large number of them the actual 

 maximum and minimum of the month. This change of temperature was ac- 



