468 



REMARKS ON THE TEMPERATURE AND 



consecutive basal readings, must be so regarded. At the crossing of the Penokie 

 Range, between the branches of Tyler's Fork, the observations were good, and 

 sufficient in number. 



The mean of sixty-nine readings, at lake-level, is — barometer, 74 '93 millime- 

 tres = 29"50 inches; attached thermometer, 67 - l° ; detached, 66 - 9°. 



The section through the drift-hills west of La Pointe, was made by referring the 

 upper station readings to a base obtained at each extremity of the line, the weather 

 being cloudy and windy all the way. These are the least satisfactory of any. 



SECTION II. 



THERMOMETRICAL READING AND CLIMATE. 



Being a large portion of the time in thick woods, it was not practicable to note 

 with accuracy the state of the clouds, or the direction and force of the winds. 



FOR JULY, 1849 



Mean of twenty morning observations gave, 

 " nineteen noon " " 



" twenty sundown " " 



Lowest in the morning, 

 " at noon, 

 " at sundown, 



Highest in the morning, 

 " at noon, 

 " at sundown, 



58 '9° Fah. 



68-3° 



65-2° 



43-5° 



52° 



56° 



78° 



81° 



78° 



There were eight heavy rains, with thunder : four from the southwest, two from the northwest, and 

 two from the west. Course of the wind : twice from the northeast, eleven times from the northwest, 

 eight times from the southeast, ten times from the southwest, three times from the south, four times 

 from the north, four times from the west, and twelve times calm. 



FOR AUGUST, 1849. 



Mean of nineteen morning observations gave, 



" sixteen noon " 



" fourteen evening, " 



Lowest in the morning, " 



" at noon, " 



u sundown, " 



Highest in the morning, " 



" at noon, " 



" at sundown, " 



54-7° 



64-5° 



(33° 



36° 



50° 



50° 



72° 



80-5° 



71° 



Fah. 



There were nine rainy days. Wind from the southwest seven times, from the southeast three times, 

 from the northeast three times, from the northwest four times, from the west eight times, from the north- 

 by-west once, from the east once. Calm thirteen times. 



These results show a remarkable equanimity of climate. 



On the morning of the 4th of August, there was, on the red clay plains, ten miles 

 from the Lake, a light frost. I once saw a heavy frost on the Fire Steel River, 



