DIY History | Transcribe | Scholarship at Iowa | Theory of the astronomical transit instrument applied to the portable transit instrument Wuerdemann no.26: a compilation from various authorities, with original observations by Harry Edward Burton, 1903 | Theory of the astronomical transit instrument applied to the portable transit instrument Wuerdemann no. 26: a compilation from various authorities, with original observations by Harry Edward Burton, 1903, Page 9

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Theory of the astronomical transit instrument applied to the portable transit instrument Wuerdemann no.26: a compilation from various authorities, with original observations by Harry Edward Burton, 1903

Theory of the astronomical transit instrument applied to the portable transit instrument Wuerdemann no. 26: a compilation from various authorities, with original observations by Harry Edward Burton, 1903, Page 9

The Relick or Reticule.

Near the eye-end of the telescope in the common focus of the object-glass an eye-piece is placed the reticle. If consist of a system of fine parallel transit lines and two other lines at right angles to them. The lines may be either eludes threads attacked to a frame or fine lines needed on very thing glass; but of whatever kind they are. For convenience, called wires the transit wires are uneven in number, one being placed in the middle and an equal number symmetrically arranged on each side.

The article of transit investment Wiudemann (No. 26 has nineteen transit lines, ruled on glass.

By revolving a diaphragm containing the reticle the transit wires can be made vertical in which position they are clamped. The middle vertical wire, D3, is to constitute a visible artificial meridian and is made to coincide approximately with the true meridian plane. The other vertical wires are added for the purpose of taking several  observations and thus recurring

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The Relick or Reticule. Near the eye-end of the telescope in the common focus of the object-glass an eye-piece is placed the reticle. If consist of a system of fine parallel transit lines and two other lines at right angles to them. The lines may be either eludes threads attacked to a frame or fine lines needed on very thing glass; but of whatever kind they are. For convenience, called wires the transit wires are uneven in number, one being placed in the middle and an equal number symmetrically arranged on each side. The article of transit investment Wiudemann (No. 26 has nineteen transit lines, ruled on glass. By revolving a diaphragm containing the reticle the transit wires can be made vertical in which position they are clamped. The middle vertical wire, D3, is to constitute a visible artificial meridian and is made to coincide approximately with the true meridian plane. The other vertical wires are added for the purpose of taking several observations and thus recurring