| RefNo | MS/603/4/81 |
| Previous numbers | 669 |
| Level | Item |
| Title | Letter from George E [Ellery] Hale, Carnegie Institution of Washington, Mount Wilson Solar Observatory, Pasadena, California, to Sir Joseph Larmor, St. John's College, Cambridge, England |
| Creator | Hall; George Ellery (1868-1938); American astronomer and solar physicist |
| Recipient | Larmor; Sir Joseph (1857-1942); Irish theoretical physicist |
| Date | 19 January 1916 |
| Description | He sent Larmor a stereogram on glass a few weeks ago, showing hydrogen flocculi surrounding a group of sunspots on 7 Augusy 1915. He should have added the following memorandum regarding the stereoscopic effect. It is easily shown that the angular value of separation of the images necessary for stereo vision is exceeded by the displacement due to solar rotation between the exposures. In all three forms of spurious effects are present, which he lists and explains. As a check on the reality of the stereoscopic effect, photographs have been made of a globe with roughened surface, turned, and enlarged by magnification, all corresponding to the solar photographs. |
| Extent | 2p. |
| Format | Typescript |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA7364 | Hale; George Ellery (1868 - 1938) | 1868 - 1938 |