Skip to main content
Open
Main navigation
Home
Projects
Themes
African American History
American Experience
Art & Design
Civil War Era
Freedmen's Bureau
Mysteries of the Universe
Women's History
Museums and Archives
Archives of American Art
Freedmen's Bureau
Harvard-Smithsonian Center for Astrophysics
Search
About
Tips
Blog
Smithsonian Digital Volunteers: Transcription Center
Sign up
Log in
Transcribe page 1 of 108
This transcription is completed and pending approval.
Switch to vertical layout
Switch to horizontal layout
Return to project home
Go to next page
Page #
Go
Download PDF for ECP1I (project ID 8647)
Post ECP1I (project ID 8647) to Facebook
Tweet ECP1I (project ID 8647)
Instructions
Transcription
For Series I Plates (8 inch Draper) 163" to a mm. For Series B Plates (8 inch Bache) 179" to a mm. For Series A Plates (24 inch Bruce) 60" to a mm. ~~~~~~~~~~~~~~~~ For Series I Plates multiply the log secant of Dec by log 1.03623 For Series B Plates multiply the log secant of Dec by log 1.07700 For Series A Plates multiply the log secant of Dec by 0.060206 or multiply the natural secant by 4 ~~~~~~~~~~~~ In computing positions of Variable Stars, A.G.C. positions of comparison Stars are used in preference to Z.C. positions, when a star appears in both catalogues per order Mrs. Fleming ~~~~~~~~~~~~~~~~ In Table I Volume XLVII R.A. is carried out to Hours, Minutes, seconds & tenths, Dec. is carried out to degrees, minutes & whole seconds, when there are seconds
Notes on Transcribing this page (optional)
This section can be used to communicate any questions or concerns to Smithsonian staff, as well as other volunteers, about this transcription. Do not use to transcribe extraneous notes made by collector or other institutions.
Math question
4 + 15 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.
Inactivity Warning
We will release your lock in
5:00
.
Click here if you are still working on this page.