DIY History | Transcribe | Scholarship at Iowa | Theory of least squares applied to the problems arising in our observatory by Arthur George Smith, 1895 | Theory of Least Squares Applied to the Problems Arising in our Observatory by Arthur George Smith, 1895, Page 68

[page]63[/page]
two wires A. B. of teh transit reticule and t the angular value of this interval; [? 03 = F ?] the focal length of the lens; then we have
tan (1/2)[superscript]t[/superscript] = [(C ?symbol?)/(?0? ?symbol?)] = ((1/2) i)/(F) in t = (i)/(F sin 1")
The eyepiece of the instrument having been removed the reticule was exposed. The rule used in the measurments was an ordinary engineers scale graded to fortieths, fiftieths and sixtieths of an inch upon its respective edges.
The distance from the wire A to the wire G was measured and noted 30 times, giving 10 measurments under each scale. The same scale was not used twice in succession but they were read in turn. A small

[page]63[/page]
two wires A. B. of teh transit reticule and t the angular value of this interval; [? 03 = F ?] the focal length of the lens; then we have
tan (1/2)[superscript]t[/superscript] = [(C ?symbol?)/(?0? ?symbol?)] = ((1/2) i)/(F) in t = (i)/(F sin 1")
The eyepiece of the instrument having been removed the reticule was exposed. The rule used in the measurments was an ordinary engineers scale graded to fortieths, fiftieths and sixtieths of an inch upon its respective edges.
The distance from the wire A to the wire G was measured and noted 30 times, giving 10 measurments under each scale. The same scale was not used twice in succession but they were read in turn. A small