Seven successive observations, taken every six hours.
Each observation is reduced for an instrumental error of +2ʹ.
For semi-diameter and also for refraction and parallax, —9ʹ.
The seven reductions are each calculated from two sextant readings, generally of an upper and lower limb.
(TAKEN FROM MY FIELD NOTES.)
| April 21, 1908, 97th meridian local time—12 o'clock noon— | 11°—54ʹ—40ʺ |
| 6 P. M. (same camp). | 12—00—10 |
| Moved camp 4 miles magnetic South | |
| 12 o'clock (midnight) | 12— 3—50 |
| April 22nd, 6 A. M. | 12— 9—30 |
| 12 o'clock noon | 12—14—20 |
| 6 P. M. | 12—18—40 |
| 12 o'clock (midnight) | 12—25—10 |
Temperature, —41. Barometer, 30.05.
Shadow 27½ feet (of 6-foot pole).
With the use of the sextant, the artificial horizon, pocket chronometers, and the usual instruments and methods of explorers, our observations were continued and our positions were fixed with the most painstakingly careful safeguards possible against inaccuracy. The value of all such observations as proof of a Polar success, however, is open to such interpretation as the future may determine. This applies, not only to me, but to anyone who bases any claim upon them.
To me there were many seemingly insignificant facts noted in our northward progress which left the imprint of milestones. Our footprints marked a road ever onward into the unknown. Many of these almost unconscious reckonings took the form of playful impressions, and were not even at the time written down.
In the first press reports of my achievement there was not space to go into minute details, nor did the presentation of the subject permit an elaboration on all the data gathered. But now, in the light of a better perspective, it seems important that every possible phase of the minutest detail be presented. For only by a careful consideration of every phase of every phenomena en route can a true verdict be obtained upon this widely discussed subject of Polar attainment.