THERMOMETRICAL OBSERVATIONS. 16 



v> 



AJlrommicaJ^ and Thermometr'tcal Ohfervations^ made at 

 the Confluence of the MiJJiJJippi, mid Ohio Rivers. 



1796. 

 Dec. 1 8th. Arrived at the confluence of the Miffiffippi, 

 and Ohio rivers about 2 o'clock in the after- 

 noon. — Cloudy all day. — Thermometer 24° 

 in the air at fun fet, and 34° in the water. 

 19th. Pitched a tent, and fet the clock up in it. — 

 Cloudy all day, except a fhort time about 

 noon. — Thermometer by Fahrenheit's fcale 9° 

 at fun rife, rofe to 19*^; fell to 12^^ at fun 

 fet, and to 1 1 ^ at 9" P. M. 



20th. Equal altitiuki nf the Sun. 



A, M. 10" 23' 54". P. M. i" 37' 37". 



Cloudy, except about i-| hours before and af- 

 ter noon, which accounts for the equal altitudes 

 not being taken farther from the meridian. — ■ 

 Cleared off in the evening. — Thermometer 

 1 1° at fun rife, rofe in the afternoon to 22°, 

 fell to 11° at 9" P. M. 



Immerfion of the 3d fatellite of % obferved at 9'' 8' 

 47" P. M. Magnifying power of the telefcope 120 — % 

 being very low, arid attended with an uncommon tremour, 

 which rendered the obfcrvation fomewhat doubtful. 



2 1 ft. Flying clouds all day, but difappeared in the 

 evening. — Thermometer 1 1 ° at fun rife, fell 

 to 8° at 10" A. M. rofe to 9" at noon, fell 

 to 3" at 7" P. M. 



Emcrjion Of the ift fatellite of If. obfet-red at 6^ 56' 

 o'' P. M. Atmofphere a little hazy. — Magnifying power 

 of the telefcope 120. 



The 



