AstronomyDetermination of time, longitude, latitude, and azimuth . ox, as canreadily be seen from illustration No. 5. The handwheels have a diameter of 33 mm., are 116 , and equidistant from the middle of the telescope, allowing ample space for manipulating ineither position of the eyepiece. The pitch of the micrometer screw is about threads per centimeter, or 123 per the telescope of Transit No. 2 the angular value of one revolution of the screw is equatorialtime seconds, nearly. As the gearing of the handwheel shaft to the micrometer screw is as 2to 1 it follows that
AstronomyDetermination of time, longitude, latitude, and azimuth . ox, as canreadily be seen from illustration No. 5. The handwheels have a diameter of 33 mm., are 116 , and equidistant from the middle of the telescope, allowing ample space for manipulating ineither position of the eyepiece. The pitch of the micrometer screw is about threads per centimeter, or 123 per the telescope of Transit No. 2 the angular value of one revolution of the screw is equatorialtime seconds, nearly. As the gearing of the handwheel shaft to the micrometer screw is as 2to 1 it follows that the hands must produce rotary motion of one revolution in about 5s for anequatorial star. The adjustment for colhmation is made by means of two nuts, x, illustration No. 4, upona small screw fastened to the micrometer box, which in turn is mounted by dovetad slidesupon a short flanged cylinder, y. The latter is fixed in position by the screws, Ji, which, whenloosened, also permit of a rotary motion for adjusting the transit wire into the vertical. Neither No TRANSIT MICROMETER. No. 5.
Size: 1327px × 1884px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoruscoasta, bookcentury1900, bookdecade1910, bookyear1913
