652 GAUSS’S OBSERVATIONS OF THE 
frequent alterations made in the Y’s and planes. The observa- 
tions were made for the most part in the forenoon, between the 
hours of eight and eleven; but on the 16th, 22nd, and 25th of 
June, and 17th and 20th of July, they ‘were made in the after- 
noon, between four and six o’clock. 
The several columns contain the mark on the north pole of 
the needle, the values of fand g or off’ and g’, according as B 
or as A was a north pole; and lastly, the time of horizontal 
vibration. 
Observations with Needle 1. 
a a“ 4 4 4“ 
May 20. | B | 6711 6 | 6758 46 | 5°87152 
Bi th he 57 1 35 14 | 5-81508 
22. | A 56 29 36 45 | 5-82044 
24, | B 16 45 45 48 | 581557 
Bio piel 18 1 49 41 | 582075 
June 2. | A 53 55 33 9 | 585778 
4.] A 56 38 3210 | 586442 
rated 24 13 46 44 | 5-83615 
July 6. | A 59 41 35 21 | 5:83716 
Au ee 58 7 37 51 | 583818 
= le 20 8 44 47 | 589602 
9. | B 20 43 44.25 | 590035 
Observations with Needle 2. 
/ A ° 4 4 LA 
May 20. | A | 67 4057 | 67 2037 | 5-72416 
21. | A 41 8 21 5 | 5:72453 
22. | B 43 28 50 45 | 565355 
24. | B 41 43 54 32 | 5°66875 
B19 43 34 18 29 | 5:67439 
June 2. | A 41 46 18 12 | 5-67665 
nt ae 42 42 46 57 | 5°68010 
fel a 44 53 50 24 | 5-68890 
July 17. | B 45 20 5017 | 5-70183 
18h) 40 26 22 50 | 5-68692 
19. | A 40 21 2210 | 569677 
20. | B 40 40 54.19 | 566585 
Observations with Needle 3. 
oO. eae Fee pat) “ 
67 47 58 67 48 52 6:17149 
June 8. B 
9. B 40 55 42 28 6-18077 
Nee! [a 30 58 82 35 6:18080 
16. B 40 0 42 40 6:17046 
18. B 43 13 47 40 6:18005 
22. A 27 33 39 19 6:16591 
23. A 29 46 41 8 6:16948 
25. A 29 3 41 7 | 617663 
July 6. A 32 38 40 37 6-18305 
if. B 45 56 42 12 | 617982 
8. B 46 59 43 37 6:18339 
‘ 9. A 30 42 39 42 6 23905 
