pill box with mica cover slips and 2 glass filters
Date: 1860-1874
Inventory Number: 1045u
Classification: Microscope Accessories
Maker: Robert B. Tolles (1823 - 1883)
Maker: Boston Optical Works (fl. 1867 - 1895)
Maker: Charles X. Dalton (1840 - 1912)
Cultural Region:
Dimensions:
box: 2.6 x 3.9 x 3.9 cm (1 x 1 9/16 x 1 9/16 in.)
Description:
This circular pill box has black sides, cardboard-brown top and bottom, and red lining.
The top is penciled, "Shades / 18 [word illegible]." The number 29 is marked in crayon and crossed out.
The box holds a glass neutral-density filter in a black collar with exterior threads. The diameter is about 3.5 cm. The aperture is about 2.8 cm. Another glass disk of similar quality but unmounted is in the box. It is the same size.
Also in the box are 5 mica cover slips of different sizes and shapes. Two are circular. Three are octagonal.
The top is penciled, "Shades / 18 [word illegible]." The number 29 is marked in crayon and crossed out.
The box holds a glass neutral-density filter in a black collar with exterior threads. The diameter is about 3.5 cm. The aperture is about 2.8 cm. Another glass disk of similar quality but unmounted is in the box. It is the same size.
Also in the box are 5 mica cover slips of different sizes and shapes. Two are circular. Three are octagonal.
In Collection(s)
Signedunsigned
Curatorial RemarksSee the file for 1045 for more details on the types of optical elements, their dates, and how they performed under tests by Ebenezer Gay.