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Home > Magnetical Instructions for the Use of Portable Instruments Adapted for Magnetical Suverys and Portable Observatories, and for the Use of a Set of Small Instruments Adapted for a Fixed Magnetical Observatory
Magnetical Instructions for the Use of Portable Instruments Adapted for Magnetical Suverys and Portable Observatories, and for the Use of a Set of Small Instruments Adapted for a Fixed Magnetical Observatory

Magnetical Instructions for the Use of Portable Instruments Adapted for Magnetical Suverys and Portable Observatories, and for the Use of a Set of Small Instruments Adapted for a Fixed Magnetical Observatory


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1844 Excerpt: ...Experiments Of Vibration. Royal Military Repository, Woolwich, August 12, 1843. Lat. 51 28' 00" N., Long. 0h 40m 00s W. of Gottingen. Magnet A 23. Weights (5 and 5-). K' = (J P + r) p; its log = 0-8019562 Experiments Of Vibration With Weights. Calculation of the Corrections for torsion, rate, and arc, and of the moment of inertia of the Magnet and Stirrup. Observations. The suspension-thread had been formed of several strong fibres, in order that no loss of time might be incurred by its breaking; the force of torsion was much larger than if a thread of only the necessary degree of strength had been used. Experiments Of Vibration. Royal Military Repository, Woolwich, August 12,1843. Lat. 51 W'OO" N., Long. 0 H. 40 M. 00 s. W. of Gottingen. Magnet A. 23 suspended without weights. Chron. (Breg. 3194) Fast of Woolwich mean time 0 H. 10 M. 32-5 s.; rate +9-5. OBSERVATIONS OF ABSOLUTE INTENSITY WITH THE PORTABLE DECLINOMETER. Experiments Of Deflection. 1. Level the instrument so that the magnet may hang in the centre of the box, and the opposite supports of the deflecting magnets be in the same horizontal plane. Adjust the line of detorsion approximately, suspend the collimator magnett, and insert the copper damper. Fix the deflecting bar supports (by estimation) in the line perpendicular to the magnetic meridian. 2. Fix the theodolite, and (if not already in adjustment) bring the vertical wire of the telescope to coincide with the centre division of the scale. The exact levelling, of.the, theodolite may be dispensed with when the angular value of the scale has been before determined with the necessary degree of accuracy. 3. Place the spare collimator magnet on one of the deflecting bar supports, at the nearest distance at which the amount of the angle ...


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Product Details
  • ISBN-13: 9781130137538
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 36
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 1130137538
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 82 gr


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Magnetical Instructions for the Use of Portable Instruments Adapted for Magnetical Suverys and Portable Observatories, and for the Use of a Set of Small Instruments Adapted for a Fixed Magnetical Observatory
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