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63

November 21, 1905.
Exam. of Plates for Comet Sehraer.
J.D. 1855 ST

[[x column table]]
Plate|Date|Exp|R.A. Dec.|
---|---|---|---|---|
I33674|Nov. 20, 1905|10|   |W. sky Reg. 6^[[h]] 25^[[m]]+59°|
AC7019|Nov. 20, 1905|66|23 52 +61 42|[[strikethrough]]N. R. 1914 +60°[[/strikethrough]]|
C16207|Nov. 20, 1905|17 7170.462|22 10|   |
C16208|Nov. 20, 1905|63 7170.500|22 41|   |
I33663|Nov. 20, 1905|10 7170.445|23 52.0 +61 42 [[strikethrough]]18 53[[/strikethrough]] 21 49|   |
I33666|Nov. 20, 1905|10 7170.584|23 504 +60 28 [[strikethrough]]19 28[[/strikethrough]]1.09|   |
I33668|Nov. 20, 1905|10 7170.624|23 50.0 +60 4 [[strikethrough]]10.42[[/strikethrough]]2 06|   |
Nov. 22, 1905
I33675|Nov. 21, 5|16 7171.449|23 43.7 +52 45 1046|   |
MC7027|Nov. 21, 5|87 7171.[[strikethrough]]4 53[[/strikethrough]]997|23 43.4 +52 23 1156|   |

R Cygni. Changes in Opectum. 

I2086, 
A photograph of R Cygni. taken with the 8-inch Draphu telescope on November 19, 1890, shows the spectrum of this star as Md, having the hydrogen lines Hj and HS bright; [[strikethrough]]While[[/strikethrough]] On a photograph I32398, taken with the same instrument on December 7, 1904, [[strikethrough]]shows a[[/strikethrough]] the spectrum of this star is of the fourth type, closely resembling Class Na, and shows no trace of bright hydrogen lines. [[strikethrough]]These spectra are specifically well designed to show the distinct difference in class on these notes.[[/strikethrough]]

[[right margin]]I32398 I2286[[/right margin]]