-40%
Irving Michelson- ANS from 1968 Signed (Aerospace Engineer)
$ 0.52
- Description
- Size Guide
Description
(1922-2008) 8.5X4 piece of paper from 1968 containing a handwritten signed letter by Irving Michelson. A terrific example of his signature.Irving Michelson, American aerospace engineer who discovered
interrelationship
of earth-moon-sun distances and their mass ratios, 1964; introduced reciprocity concept in planetary mechanics, explanation of earth's rotational speed value, 1965-1966; new formulation of ocean tide theory.
If the item sells for or less the item will come with our 3x3 authentication card and hologram affixed to the back of the item. If the item sells for and over it will come with a full Letter of Authenticity from Todd Mueller Authentics.