Scales for evaluating components of magnetic attraction

✍ Scribed by R.H.O.

• Publisher: Elsevier Science
• Year: 1941
• Tongue: English
• Weight: 58 KB
• Volume: 231
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(41)90293-4

✦ Synopsis

Scales for Evaluating Components of Magnetic Attraction.--A

set of scales has been developed by the Geophysical Section of the Geological Survey, United States Department of the Interior, by means of which magnetic anomalies due to geologic bodies of any size or shape on any known or assumed distribution of magnetization may be evaluated. While these scales were originally constructed for evaluating magnetic anomalies, they are equally useful for solving problems involving all fields under the inverse square law, such as gravitational attraction, electric fields, intensity of illumination, etc. A set of 39 scales, drawn on a scale modulus of one inch equals one unit, on two sheets suitable for mounting, has been photolithographed from a master set prepared by the Section of Geophysics. The set contains one scale for each multiple of ½ unit from one to twenty units inclusive. The scale values are computed for a point source of pole strength of IOOO magnetic units. They may be obtained from the Director, Geological Survey, Washington, D.C. R. H.