DIY History | Transcribe | Scholarship at Iowa | Eccentricity of the Sextant by Frederic Furbish, 1893 | Eccentricity of the Sextant by Frederic Furbish, 1893, Page 102

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Eccentricity of the Sextant by Frederic Furbish, 1893

Eccentricity of the Sextant by Frederic Furbish, 1893, Page 102

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the first or observation blank we get the date (May 2, 93) and number of series 51 which we record in the proper spaces together with the declination (δ) and name of the star (∝ Virginis), the barometer reading (Bar.) and the exterior temperature Tε (33.5°). From the third sheet we get the mean value of h[subscript]0[/subscript] or (1/2) ∝' (37° 44' 41.53") and the probable error of this mean, γ' = +-(([?s? or ?v?])/(square root of n)) = 1.202" , B = sin (1/2) ∝' and A = 1 - cos (1/2) ∝'  . Referring to a table of natural sines cosines we find that sin 37° 44' 41.53" = .61215 and 1 - cos 37° 44' 41.53" = .20926

     To find (b) we refer to Tables II A , IIB and IID of Doolittle's Practical Astronomy Pp.628-629. We have three factors to work with, the observed altitude 37° 44' 41.53" or practically 37 3/4° , the exterior temperature

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[page][illegible][/page] the first or observation blank we get the date (May 2, 93) and number of series 51 which we record in the proper spaces together with the declination (δ) and name of the star (∝ Virginis), the barometer reading (Bar.) and the exterior temperature Tε (33.5°). From the third sheet we get the mean value of h[subscript]0[/subscript] or (1/2) ∝' (37° 44' 41.53") and the probable error of this mean, γ' = +-(([?s? or ?v?])/(square root of n)) = 1.202" , B = sin (1/2) ∝' and A = 1 - cos (1/2) ∝' . Referring to a table of natural sines cosines we find that sin 37° 44' 41.53" = .61215 and 1 - cos 37° 44' 41.53" = .20926 To find (b) we refer to Tables II A , IIB and IID of Doolittle's Practical Astronomy Pp.628-629. We have three factors to work with, the observed altitude 37° 44' 41.53" or practically 37 3/4° , the exterior temperature