File:Four-point.png

DescriptionFour-point.png Schematic of a four-point resistance measurement. Date 20 July 2007 Source http://en.wikipedia.org/wiki/File:Four-point.png Author

below supports rendering all of the four "situations" portrayed in the image - see the comment given in the code. The four images were subsequently combined

of the four innermost circular white areas intersect at a single point). For different versions, see Image:Quatrefoil-Architectural-alternate.png and

is a pair of Soddy circles and a Soddy line. The four Soddy lines concur at the de Longchamps point. author name string: Jacob Rus Wikimedia username:

language-neutral modification of this image here: Image:Lunarparallax_22_3_1988_neutral.png Example of lunar parallax from 4 points on earth This is a simulated image