Van Nostrand's engineering magazine . he vernier of the ordinary cisternbarometer is represented in Fig. 4. Thescale space is -£$ inch, and 25 vernierspaces exactly cover 24 scale spaces,giving a direct vernier whose least count is inhr m- 5J = Tjj-g- in. :every fifth vernier division, 10 0 in. and 33, is num- SUBSCALES, [NOLUDING VERNIERS. 309 bered. The vernier is forward arranged,arid the third vernier division after theone numbered 1 is coincident. It + .01+ 3 = The most common errors are to omitthe first adjustment, § 17 ; and in read-ing to neglect one of the leas
Van Nostrand's engineering magazine . he vernier of the ordinary cisternbarometer is represented in Fig. 4. Thescale space is -£$ inch, and 25 vernierspaces exactly cover 24 scale spaces,giving a direct vernier whose least count is inhr m- 5J = Tjj-g- in. :every fifth vernier division, 10 0 in. and 33, is num- SUBSCALES, [NOLUDING VERNIERS. 309 bered. The vernier is forward arranged,arid the third vernier division after theone numbered 1 is coincident. It + .01+ 3 = The most common errors are to omitthe first adjustment, § 17 ; and in read-ing to neglect one of the least spaces onthe main scale, when the scale divisionread is not an even tenth of an inch. least count is 1. There are two sets ofnumbers, each increasing from 0 to 15 atone end, and then from 15 at the otherend to the middle division. The divisionnumbered 7 and 23 coincides. The read-ing is 1° 7, 7 being the set of numbersgiving forward arrangement, § 29. Sucha vernier is in use on the vernier com-pass by W. and L. E. Gurley. ?
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License: Licensed
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
