parabolic mirror
Date1900 - 1950
Inventory Number2007-1-0049
ClassificationMirror
Subject
Maker
American
Place of Origin
Dimensions18.3 × 15.3 × 5.5 cm (7 3/16 × 6 × 2 3/16 in.)
box: 7.6 × 20 × 19.1 cm (3 × 7 7/8 × 7 1/2 in.)
box: 7.6 × 20 × 19.1 cm (3 × 7 7/8 × 7 1/2 in.)
Material
DescriptionThe parabolic mirror is held by a steel frame meant to stand upright. The mirror was most likely meant to be used on an optical bench. Hand-written inscription made with a pen has been mostly erased. The surface of the mirror looks like it was silvered.
The letter "H" (for Harvard) has been painted in orange on the frame.
The letter "H" (for Harvard) has been painted in orange on the frame.
Signedunsigned
FunctionWas used to reflect light from a source so the light beams were all parallels to each other.
See how such a mirror was used by Jules Duboscq toward the end of the nineteenth century, here.
See how such a mirror was used by Jules Duboscq toward the end of the nineteenth century, here.
Wilmer C. Anderson
Date: 1937-1941
Accessories: cover is stored separately
Object number: 1996-1-0677
John Cuthbertson
Date: 1770-1815
Accessories: brown storage box, descriptive tag, thin strip of paper in box with the inscription "lucernal microscope" in David P. Wheatland's handwriting (which refers to figs. 47-48 and 51 in this series), page from the book "Old Science and Medicine" with a photographic copy of the first print from this series, entitled "The Large Electric Machine at Haarlem."
Object number: 1998-1-1087
American
Date: circa 1960
Accessories: dust cover
Object number: 1997-1-0043
