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95

[[underlined]] January 8, 1909. [[/underlined]]

Exam. of Plates on Pole to det. limit of visibility of plates having exposures of 10^[[s]]. See letter of Frank E. Ross, Dec. 16, 1908

Plate | Date | Ex. | 

I 35758 | Dec. 21, 1908 | 10[[superscript]] s [[/superscript]] | No images within 1° of North Pole identified with certainty. The plate shows + 88° 72° 12 15 31 + 88 35.1 mgn 9.3 and + 88° 73° 12 21 56 + 88 39.8 magn. 9.5 as about 0.1 and 0.3 magn. within the limit of visibility. 

C 17559 | Dec. 19, 1908 | 10^[[s]] Pole }
C 17567 | Dec. 21, 1908 | 10^[[s]] 9^[[h]] 20^[[m]] + 90.0 Pole } | Both plates superimposed in turn in C6170 taken Nov. 3, 1893. fails to show any image which can be readily identified. 

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