Object name: | Heliostat secondary mirror. |
Maker: | Possibly the John A. Brashear Co., Allegheny PA. |
Serial / Maker's No: | |
Patent Date / Patent No / Date of Manufacture: | Similiar items were sold by the Brashear Co. around 1910. |
Length: | |
Width/Depth: | |
Height: | 20-1/2 to 29" |
Diameter: | The base has a 12" diameter footprint. |
Weight: | 17.25 lbs. |
Description: | Probably used for teaching purposes. The mirror measures 3/8" x 4-3/4" x 10" |
References: | |
Provenance: | |
Inventory Number: | D4L |