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Frank Swannell Diaries: Part I

Diaries of Frank Cyril Swannell Learn more.

*All transcriptions are provided by volunteers, and the accuracy of the transcriptions is not guaranteed. Please be sure to verify the information by viewing the image record, or visiting the BC Archives in person. 

BC Archives MS-0392 - Box 1, Volume 4-5

*Please note that archival source materials are original historical documents that have not been censored, reviewed or otherwise altered by the Royal BC Museum. Some materials may contain content that is racist, sexist or otherwise offensive. The Royal BC Museum is only the custodian of archival materials; the content does not necessarily reflect the views or policies of the Royal BC Museum.

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MEMORANDA. [1st, Sun rises 8 h. 8 m.

Fig 76 Fig 77 P = Pole of the heavens Fig 77 drawn on the plane of the meridian, showing the circles of the upper hemisphere, as the would appear to the eye situated at a great distance due East of the sphere. NWSE (Fig 76) or the horizon

- appears as a st. line, NS being seen edgewise

The Meridian (NS - Fig 76) appears as semicircle NP22. The E. + W. Points are seen in one with the centre ENW - 50[?] [degrees] fr. the pole is the Celestial Equator

Prime Vertical - EZW passing thru the E.+W. pts (In Fig 77 EZW does not appear being one with CZ, a radius joining the centre Zenith.

When the observer is on the equator the celestial Equator + prime vertical coincide

Altitude is measure on a circle of altitude from the horizon AH = altitude of A

Parallels of altitude are circles parallel to the horizon

Zenith Distance (Co-Altitude) is the arc included between the zenith and celestial body - ZA

Declination is that portion of the Meridian between the Equator and the body - Reckoned N. or S. from the Equator A3 = [illegible] of "A" Declination and Terrestial Latitude correspond - that is a star in 28[degrees] N. Dec. passes every day vertically over all places in 28[degrees] N

Polar Distance is the arc of the Celestial Meridian between a Celestial body + the Pole When Lat. + Dec are same name the P.D is the complement of the [delta?] to 90[degrees] When Lat. + [delta?] are different names PD = [delta?] + 90[degrees]

Azimuth is the Angle at the Zenith contained between the Merid. of the place + the circle of altitude passing thru the body. L.PZA is azimuth of A. (In Geodetic Computations reckoned from South around to 20

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BC Archives, MS-0392 Box 1 Volume 4 / FRANK SWANNELL PAPERS / Diary and enclosures, 1915.

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