Astronomical and Meteorological Records^ ^c. xxv 



Jan. 7, 1820. 



Time from Noon, 

 A. M. 



3" 06' 40" 

 3 04 24 

 3 02 05 



Time from Noon, 

 P. M, 



" 24' 57" 1 

 22 40 V 

 20 23 j 



Error of Time- 

 piece. 



27' 23" slow. 

 Mean time. 



On the 15th January the box chronometer ran down. In the after- 

 noon it was ae;ain wound up and re-adjustcd by a watch whose error 

 was not known. 



January 25. A trigonometrical measurement was this day made to 

 ascertain the height of the hills near Engineer Cantonment, above 

 the low-water mark of the INIissouri. 



The altitude of the highest hill, as deduced from this measurement, 

 is 275 feet above low-water mark. 



Equal altitudes of Sun to jind error of Time-piece, (box chrono- 

 meter.) 



Time from Noon, Time from Noon, i Error of Time- 

 A. M. P. M. piece. 



Feb. 20, 1820. 



Feb. 20, 1820. 



2" 51' 44" 

 2 49 55^: 

 2 48 06 



Time before mid- 

 night. 



19' 40" 

 17 51 

 16 03 



3'' 43' 

 3 42 

 3 40 



56" 

 9 

 20 



11 11'431" 

 I Mean tin 



Time after mid- 

 night. 



9^ 08' 19|" 

 9 06 32 

 9 04 44 



} 



A" fast. 

 time. 



Error of Time- 

 piece. 



10' 43" 50'" fast. 

 Mean time. 



*9 mean of ten lunar distances^ between the nearest limbs of sun and 

 moon., and of the times correspondent. 

 Time of observa- Distance of Sun 

 tion, P. M. and Moon. 



Feb. 20, 1820. 



1" 50' 55" 

 Baromet. 28.84 



88° 45' 56" 

 Thermomet. 36*^ 



Index error. 



— 28" 



Allowance to be made for error and variation of time-piece. 

 Longitijje deduced 6" 22' 43" or 95° 40' 45" W. of Greenwich. 



March 20, 1820. 



Meridian double altitude of ") ', 

 sun's lower limb, (small sex- 

 tant) - - - 



} 



Index error — 4' 07". Latitude 

 I deduced 



96° 47' 15" 



41 25 07 N. 



April 2, 1820. In order to ascertain the perpendicular fall of the 

 Missouri in a given distance, I measured accurately on a straight 

 Vol. II. D 



