CONTRIBUTIONS TO THE NATURAL HISTORY OF ALASKA. 



Meteorological observations at Fort Yukon — Continued. 



43 







THERMOMETERS. 





Barometer 

 reduced to 

 standard 

 and 32° F. 



Wind. 



Clouds. 



Date. 



Time. 



Under 



cover. 



Open air. 



Barometer 

 uncor- 

 rected. 



Direc- 

 tion. 



Force. 



Amount. 



Kind, 





















Att. 



Det. 



Dry. 



Wet. 

















1869. 



h. m. 











o 



o 









. 









Aug. 21 



9 00 p. m . . . 



61.0 



64.0 



53.5 



58.0 



.445 



.345 



SW. 



1 



3 



Cuio. cir. strat. 





Aug. 22 



10 30 a. m ... 



59. 



«B1.0 



58.2 



52.4 



29. 665 



29.571 



SW. 



2 



7 



Cum. cir. strat. 







11 00 a. m ... 



61.0 



63.0 



58.0 



52.5 



.665 



.565 



SW. 



2 



7 



Cum. cir. strat. 







12 00 m ... . 



61.0 



63.0 



58.2 



52.5 



.674 



.574 



SW". 



3 



7 



Cum. cir. strat. 







1 00 p. m 



61.0 



63:0 



59.0 



51.3 



.625 



.525 



SW. 



2 



7 



Cum. cir. strat. 







2 00 p. m ... 



61.0 



65.0 



62.7 



53.7 



.625 



.525 



SW. 



2 



5 



Cum. cir. strat. 







3 00 p. m - . . 



65.0 



69.0 



65.5 



56.2 



.635 



.525 



SW. 



2 



5 



Cum. cir. strat. 







4 00 p. m . . 



66.0 



67.0 



63.0 



59.6 



.645 



.532 



sw. 



2 



5 



Cum. cir. strat. 







5 00 p. m ... 



71.0 



69.0 



63.5 



56.9 



.655 



.529 



SW. 



2 



6 



Cum. cir. strat. 







6 00 p. in ... 



76.0 



69.0 



65.0 



55.4 



.635 



.496 



SW. . 



2 



4 



Cum. cir. strat. 







7 00 p. m . . 



65.0 



67.0 



58.2 



52.0 



.615 



.505 



SW. 



2 



4 



Cum. cir. strat. 







8 00 p. m 



61.0 



65.0 



55.2 



51.1 



.615 



.515 



SW. 



2 



5 



Cum. cir. strat. 





Aug-. 23 



7 00 a. in 



57.0 



59.0 



49.5 



47.0 



29. 764 



29. 675 



SW. 



2 



2 



Cum. cir. strat. 







8 00 a.m... 



56. 



59.0 



51.0 



50.4 



.715 



.628 



SW. 



2 



2 



Cum. cir. strat. 







9 00 a. m . 



58. 



60.0 



55.2 



49.3 



.765 



.673 



SW. 



2 



1 



Cum. cir. strat. 







10 30.a. in .. 



59. 



61.0 



60.7 



53.2 



.756 



.662 



SW. 



2 



4 



Cum. cir. strat. 







1 1 00 a. in ... 



59.0 



62.0 



62.5 



53. 6 



.756 



.662 



SW. 



2 



4 



Cum. cir. strat. 







12 00 m 



60.0 



65.0 



65.2 



55.3 



.745 



.648 



E. 



1 



3 



Cum. cir. strat. 







1 00 p. m .. 



62.0 



68.0 



63.7 



58.0 



.736 



.634 



SW. 



1 



3 



Cum. cir. strat 







2 OH p. m . . 



63.0 



68.0 



71 



58.5 



.736 



.631 



SW. 



1 



4 



Cum cir. strat. 







3 00 p. in ... 



65.0 



69.0 



72.0 



56.0 



.725 



.615 



SW. 



1 



4 



Cum. cir. strat. 







4 00 p. m . . . 



66.0 



69.0 



66.2 



58.2 



. 715 



.602 



SW. 



1 



4 



Cum. cir. strat. 







5 00 p. m . . . 



66.0 



68.0 



65.0 



. 56.7 



.695 



.582 



w. 



1 



5 



Cum. cir. strat. 







6 00 p. in ... 



63 



66.0 



63.4 



54.0 



.675 



.570 



w. 



1 



6 



Cum. cir. strat. 





Aug. 24 



9 00 a. m ... 



56.0 



59.0 



55.0 



51.0 



29.437 



29. 350 



E. 



1 



2 



Cum. cir. strat. 







10 00 a. m .. 



58.0 



60.0 



01.0 



52.0 



.426 



.334 



E. 



1 



2 



Cum. cir. strat. 







11 00 a. m ... 



60.0 



63.0 



64.3 



56.5 



' .415 



.318 



E. 



1 



2 



Cum. cir. strat. 







12 00 m 



61.0 



65.0 



68.4 



55.4 



. 453 



.353 



N. 



1 



^ 



Cum. cir. strat. 







1 00 p. in ... 



62.0 



66.0 



65. 



55.0 



.396 



.294 



N 



1 



3 



Cum. cir. strat. 







2 00 p. in ... 



03. 



67.0 



68.2 



54. 5 



.376 



.271 



E. 



1 



4 



Cum. cir. strat. 







3 30 p. in . . . 



61.0 



65.0 



64.0 



55.0 



.356 



.256 



E. 



1 



4 



Cum. cir. strat. 







4 00 p. m ... 



62.0 



65.0 



64.3 



55.4 



.346 



.244 



E. 



1 



6 



Cum. cir. strat. 







5 00 p. in . . 



62.0 



65.0 



63.4 



55.3 



.345 



.243 



E. 



1 



6 



Cum. cir. strat. 







6 00 p. in . . 



61.0 



64.0 



61.0 



56.5 



.326 



.226 



S. 



1 



6 



Cum. cir. strat. 







7 00 p. m . 



60.0 



63.0 



59.0 



53.4 



.316 



.219 



N. 



1 



7 



Cum. cir. strat. 







8 00 p. m . . 



60.0 



63.0 



54.0 



50.0 



.265 



.168 



J,'. 



1 



7 



Cum. cir. strat. 





Aug. 25 



10 30 a. in 



59.0 



62.0 



56.0 



54.0 



29. 348 



29. 254 









7 



Nim. cum.. 







12 00 m 



60.0 



64.0 



62.5 



58.0 



.346 



.249 



NE. 



1 



5 



Cir. nim. 







1 00 p. m . . 

 3 00 p. m . . 



60.5 

 60.0 



64.0 

 64.0 



62.3 



60.7 



58.0 

 55.5 



.337 

 .335 



.239 

 .238 









1 





 8 



Nim. cum. strat. cii 







S. 



.; light 

























rain. 





Aug. 26 



9 00 a. in ... 



59. 5 



62.0 



56.7 



56.0 



29. 349 



29. 253 









7 



Cum. cir. nim. 







10 30 a. m ... 



59.5 



63.0 



59.5 



56.0 



.347 



.251 



s. 



1 



4 



Cir. cum. 







12 00 in 



60.5 



64.5 



62.8 



58.2 



.345 



.247 



SW. 



1 



4 



Cir. cum. 







1 00 p. in ... 



62.0 



67.5 



67.3 



60.0 



. 343 



.231 



SW. 



1 



4 



Cir. cum. 







2 00 p. in . . . 



63.0 



67.5 



65.0 



58.5 



.336 



.231 



SW. 



1 



6 



Cir. cum. 







4 00 p. in . 



63.5 



67.5 



06.5 



00.0 



. 330 



.224 



sw. 



1 



c 



Cir. cum. 







5 00 p. in . . 



62. 5 



66.0 



64.3 



58.0 



.328 



. 224 









7 



Cir. cum. 





Aug. 27 



9 00 a. in ... 



55.0 



58.0 



48.5 



47.0 



29. 447 



29. 363 



'Vw\" 



2 



7 



Nim. 







1 1 00 a. in . . 



56.0 



59.0 



49.0 



47.8 



.460 



.373 



NW. 



3 



7 



Nim.; light rain. 







12 00 m .... 



56.5 



60.5 



50.0 



47.5 



.475 



.387 



nw. 



2 



7 



Cum. nim. 







4 00 p. in ... 



60.0 



62.0 



50.0 



48.0 



.476 



.379 



NW. 



2 



7 



Cum. nim. 







7 00 p. in . . 



56.0 



00.5 



• 46.5 



43.5 



.493 



.406 



NW. 



3 



8 



Nim. 





Observations of minimum temperature during Hie night. 

 [Spirit thermometer, having a steel index within the tube.] 



Date. 



Observed 

 minimum 

 tempera- 

 ture. 



Thermom- 

 eter re- 

 duced to 

 open-air 

 dry ther- 

 mometer. 



Date. 



Observed 

 miDimum 

 tempera- 

 ture. 



Thermom- 

 eter re- 

 duced to 

 open-air 

 dry ther- 

 mometer 



August 19, 1869 



Aii"Ust20 1809 



o 

 41.0 

 43.5 

 42.4 



42.4 



° 

 39.6 

 42.0 

 40.9 

 40.9 



August 24 1869 



o 

 36.2 

 46.0 

 48.0 

 44.5 



o 

 34 9 



August25, 1869 



August 26, 1869 



44.4 





46.3 



August 23 I860 



August 27, 1869 



43. 









Latitude 66° 33' 47", longitude 145° 17' 47" west of Greenwich 

 September, 1869. 



computed by Capt. C. W. Raymond, Engineer Corps, XJ. S. Army, July to 



