|Contribution||Introduced a binocular microscope.|
|Notes||He used a prism to split the light beam and deflect half of it up a second tube that converged on the main tube. Popular, but useful only for low magnification (because of loss of transmitted light). After about a decade, the design was superseded by better designs. [An example, made by Fisher of London, is in the collection of W. C. Campbell.]|
Copyright © 2007- William C. Campbell. All rights reserved.