8A05.50 - Circular Sundial

Code Number:
8A05.50
Demo Title:
Circular Sundial
Condition:
Good
Principle:
Earth Inclination and Position on Earth
Area of Study:
Astronomy

Disclaimer

Equipment:
Sundial.
Procedure:

Sundial set for a latitude of 41 degrees 40 minutes North and a longitude of 91 degrees 31 minutes West.  Set the sundial up so that it is facing in a straight North, South and East, West alignment.

References:
  • Barbara Rovšek, "Observe Your Shadow", TPT, Vol. 54, #4, Apr. 2016, p. 223.
  • Alejandro Gangui, "Fixing the Shadows While Moving the Gnomon", TPT, Vol. 53, #4, April 2015, p. 199.
  • Michael J. Burin, "Some Daytime Activities in Solar Astronomy", TPT, Vol. 43, #1, Jan. 2016, p. 36.
  • Barbara Rovšek, "Calibration of a Horizontal Sundial", TPT, Vol. 48, #6, Sept. 2010, p. 397.
  • David P. Stern, "Sundials and Compasses", TPT, Vol. 41, #7, Oct. 2003, p. 380.
  • Harry Manos, "Galileo's Lens", TPT, Vol. 41, #5, May 2003, p. 268.
  • Michelle B. Larson, "Constructing a Portable Sundial", TPT, Vol. 37, #2, Feb. 1999, p. 113.
  • Jim Cowan, "Solar Observations in a Classroom", TPT, Vol. 33, #6, Sep. 1995, p. 327.
  • Richard Hansgen, "Response to Egler", TPT, Vol. 33, #5, May 1995, p. 262.
  • Robert A. Egler, "Definition of Angles", TPT, Vol. 33, #5, May 1995, p. 262.
  • Richard Hansgen, "Watching the Earth Spin: A Determination of Midday", TPT, Vol. 33, #2, Feb. 1995, p. 116.
  • Malcolm M. Thomson, "Sundials", TPT, Vol. 10, #3, Mar. 1972, p. 117.
  • Philip M. Sadler, "An Ancient Time Machine: The Dial of Ahaz", AJP, Vol. 63, #3, Mar. 1995, p. 211.
  • V. Zanetti, "A Sundial Design", AJP, Vol. 52, #2, Feb. 1984, p. 185.
  • Herman Erlichson, "The Horizontal Sundial", AJP, Vol. 42, #5, May 1974, p. 372.
  • 50 Fun Experiments for the Mad Scientist in You, "Make a Sundial", National Geographic Kids, p. 130.
  • "For Word Nerds", Uncle John's Bathroom Reader, p. 269.
  • "How to Lay Out A Sundial", The Boy Scientist, p. 52.
  • "The Science of the Sundial", The Boy Scientist, p. 42.
  • "Build Your Own Sundial", The Girl Mechanic Goes Outdoors, ISBN 978-1-58816-801-6, p. 97 - 107.
  • Ron Hipschman, "Sun Dial", Exploratorium Cookbook II, p. 134.1 - 134.5.
  • Martin L. Keen, Let's Experiment: Over 150 Safe, Easy Experiments for Junior Scientists to Perform at Home, p. 36 - 40.
  • H. S. Stuttman, "Sun Dial", The New Illustrated Science and Invention, p. 2665 - 2666.
  • Shar Levine & Leslie Johnstone, "Here Comes the Sun", Everyday Science, p. 41 - 43.
  • Janice VanCleave, "#5, Lower", Janice VanCleave's 203 Icy, Freezing, Frosty, Cool, and Wild Experiments.
  • D. Tattersfield, "5.13, The Sundial", Project & Demonstrations in Astronomy, p. 93.
  • Rudolf F. Graf, "How to Tell Time with a Compass", Safe and Simple Electrical Experiments, p. 65.
  • Dr. Gordon Stables, R.N., C. Stansfeld Hicks, J. N. Maskelyne, Rev. Harry Jones, M.A, Dr. Stradling, Captain Crawley, Rev. A. n. Malan, M.A., F.G.S., and Many Others, "Chapter XLIV - How to Make a Pocket Compass and Timepiece", The Boy's Own Book of  Indoor Games and Recreations, A Popular Encyclopaedia for Boys, p. 396.
  • Dr. Gordon Stables, R.N., C. Stansfeld Hicks, J. N. Maskelyne, Rev. Harry Jones, M.A, Dr. Stradling, Captain Crawley, Rev. A. n. Malan, M.A., F.G.S., and Many Others, "Chapter XXXV - How to Make a Sundial", The Boy's Own Book of  Indoor Games and Recreations, A Popular Encyclopaedia for Boys, p. 347.
  • "The Sun Dial", Pike's Illustrated Catalogue of Scientific & Medical Instruments, 1984, p. 135.

Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.