Name/Title
HeliostatEntry/Object ID
2013.3.41Description
This optical instrument was used to fix the sun's image for various kinds of observations needing a bright light. The mirror is four and one-half inches in diameter. It is in good working condition.
Knight (American Medical Dictionary, New York, 1876-7) credits Gravestand with inventing this instrument in 1719. Various improvements were added by others.
While there is no name of the maker on this instrument, it is included among the London purchases made by Dr. Fall. He gives its value as $42.00.Collection
Moosnick Museum - Scientific Apparatus
