Compound achromatic microscope, McArthur type

Description

The McArthur microscope was designed around 1930 by the Glasgow physician John McArthur. The instrument is very compactly built, which was made possible by inserting two rectangular prisms in the optical path. Many versions were made during the second half of the twentieth century, this one by Cooke Troughton and Simms is very rare, reportedly not more than 1000 were made. On its tripod stand with a flat mirror, a condenser and a stage for standard microscopical slides and three objective lenses in a sledge, magnifying 10×, 40× and 100×.

See also SM 453.