Details
A Duboscq colourimeter
by Spencer, Buffalo, No. 310, with two rack-and-pinion controlled glass phials with vernier scales and mirrors, in black'jug-handle' stand with silvered and opaque glass mirror -- 11½in. (29cm.) high, early 20th century, in wood case
by Spencer, Buffalo, No. 310, with two rack-and-pinion controlled glass phials with vernier scales and mirrors, in black'jug-handle' stand with silvered and opaque glass mirror -- 11½in. (29cm.) high, early 20th century, in wood case