ASTRONOMICAL AND GEODETIC OBSERVATIONS. 



21 



Pocket sextant . 

 Index correction 



Deep Snow Camp, Smith Sound. 

 Observations for latitude of camp, May 21st, 1861. 

 Meridian altitude of the sun, Dr. I. I. Hayes, observer. 

 20 



61° 48' T = + 22° (about). 



. — 1 32 B = 30'".0 at 60° approximately. 



Approximate longitude i^ 51" 



Altitude .... 

 Refraction — par. . 

 Semidiameter . 

 Maximum altitude . 

 S at apparent noon 



60 

 30 



16 



08.0 



1.1 



15.8 



30 



20 



22.1 

 16.9 



19 54.8 



Pocket sextant , 

 Index correction 



Camp Hawks, Smith Sound. 

 Observations for latitude of camp. May 22d, 1861 

 Meridian altitude of the sun. Dr. I. I. Hayes, observe. 

 20 



62° 34' T = + 20° (about). 



. — 1 32 B = 30'M at 58 approximately. 



Approximate longitude 4'' 53"^ 



Altitude . . . 

 Refraction — par 

 Semidiameter 



Maximum altitude 

 S at apparent noon 



61 

 30 



+ 



02 



31.0 



1.1 



15.8 



30 

 20 



45.1 



28.8 



19 43.1 



Small berg Camp, Smith Sound. 



Observations for latitude of camp, May 23d, 1861. 



The meridian altitude of the sun is recorded 20 62° 58' with a 1 attached. 



As the resulting latitude is the same as that of the preceding camp, and the. 



position of the camp on the track chart disagrees with it, I shall make no use of 



this observation. 



Seouse Camp, Smith Sound. 

 OJpservations for latitude of camp. May 23d, 1861. 

 Meridian altitude of the sun, lovper culmination.* Dr. I. I. Hayes, observer. 

 20 



T = + 18° (about). 



B = 29'".9 at 65° approximately. 



Approximate longitude 4'' 52|-'" 



Pocket sextant . . 



21° 



40' 



Index correction 



— 1 



31 





20 



09 



Altitude . . . . 



10 



04.5 



Refraction — par. . 



— 



5.5 



Semidiameter . . 



+ 



15.8 



Minimum altitude . 



10 



14.8 



S at apparent midni 



ght 20 



45.8 



19 29.0 



' For upper culmination, ^ = 90 + S — h 

 For lower culmination, ^ = 90 — S -\- h 



