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40

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Friday, August 12, 1910

Oxford and Potsdam Stars near R.Q=12^[[h]] Dec.=+31^[[degree]] Prismatic Companions.

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Scale M
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Plate I26856

Potsdam Stars
[[6 columned table]]
|   | 2nd scale | 2nd scale, remeasured |   | 2nd scale | remeasurement |
| --- | --- | --- | --- | --- | --- |
| P.C. 5 | 9.8 10.0 | 9.90 11 | P.C. |   |   |
| 7 | [[strikethrough]] 9.1 [[/strikethrough]] us |   |   | 69 | us |   |
| 8 | 9.1 9.4 | 9.5 9.33^[[212]] | 92 | 9.9 9.8 | 9.85 10 |
| 9 | 8.4 8.4 | 8.40 00 | 94 | us |   |  
| 15 | 9.1 9.1 | 9.10 00 | 100 | 7.7 7.7 | 7.70 00 |
| 19 | 8.9 9.0 | 8.95 10 | 101 | us |   |
| [[strikethrough]] 29 | 7.7 [[/strikethrough]] |   |   |   |   |
| 26 | 9.2 9.2 | 9.20 00 | 106 | us |   |
| 31 | us |   | 116 | us |   |
| 32 | us |   | 122 | 9.8 9.9 | 9.85 01 |
| 43 | us |   |   |   |   |
| 46 | us |   |   |   |   |
| 47 | us |   |   |   |   |
| 51 | us |   |   |   |   |
| 53 | 9.1 8.9 | 9.00 11 |   |   |   |
| 57 | 9.1 9.2 | 9.15 10 |   |   |   |
| 66 | us |   |   |   |   |
[[new chart begins below with same columns 1-3]]
| --- | --- | --- | Previous meas. | Diff. |
| Star 20 | 7.7 7.8 | 7.75 10 | 7.85 | .10 |
| " 16 | 7.8 7.9 | 7.85 01 | 7.80 | .05 |
| " 120 | 7.8 7.9 | 7.85 01 | 7.90 | 05 |
| " 123 | 7.4 7.5 | 7.45 01 | 7.25 | 20 |
| " 124 | 6.8 6.8 | 6.80 00 | 7.02 | 22 |
| " 93 | 8.3 8.0 | 8.0 8.10 211 | 8.20 | 10 |
|   |   |   |   | [[equation]] |

A.D.[[G?]]

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Oxford Stars
[[5 columned table]]
| [[overwritten, strikethrough]] Stars P.C. [[/overwritten, strikethrough]] Diff. | [[Prev.?]] Meas. |   | 2nd scale | Remeasurements |
| .10 | 8.80 | 41 | 8.7 8.7 | 8.70 00 |
| 05 | 8.85 | 45 | 8.9 8.9 | 8.90 00 |
| 05 | 8.85 | 28 | 8.9 8.9 | 8.90 00 |
| 10 | 8.85 | 29 | 8.9 9.0 | 8.95  [[1/?]] |
[[5 empty rows]]
| 05 | 8.90 | 34 | 8.8 8.9 | 8.85 01 |
| 05 | 9.05 | 55 | 9.0 9.0 | 9.00 00 |
| 10 | 8.95 | 56 | 9.1 9.0 | 9.05 10 |
| [[equation]] |   |   |   |   |

The remeasurement of star image show no systematic difference in use of scale. The measures of prismatic companions, therefore, may safely be compared with measures of star images.

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41

Saturday, August 13, 1910

Oxford and Potsdam Stars

Special Examination of T' Plates AC9552 and AC 10318.

On Plate AC 10318, Star f^[[2]] [[symbol]] of Polar Sequence is very well seen. Star f^[[3]] is either [[defective?]] or superposed. Are [[misp. Our]] subject near the position of star g may or may not be the star but the image is too faint and poor to [[verphy? could be misp. of verify]]. Use stars only as far as f^[[2]] in this plate. All faint images are very poor. Do not use for Potsdam and Oxford magnitudes for images fainter than reading [[strikethrough]] 9.5 [[/strikethrough]] 9.4. 

On Plate AC 9552 star f^[[2]] is seen but very faint. f^[[3]] is present but too faint to use with safety. Do not use for stars fainter than scale reading 9.7

Transcription Notes:
Some questions on spelling, primarily the signature and the right page.