1851 Great Exhibition: Official Catalogue: Class X.: Thomas D. King
287. KING, THOMAS D., Bristol — Designer and Manufacturer.
Compound achromatic microscope mounted on a pyramidal tripod, with mechanical stage, traversing in rectangular planes by micrometer screws, achromatic condenser, polariscope, double refracting goniometer, cobweb micrometer and other eye-pieces, insect forceps, and various accessories. In this microscope the weight is equally distributed over the base, and when inclined at its working angle the chief portion is brought below the point of suspension; the traversing stage has divided scales and verniers, whereby admeasurements can be accurately determined.
Student's compound achromatic and single microscope.
Improved spherical prismatic illuminator, for transparent and opaque microscopic objects, enabling the rays of light to be thrown either obliquely or vertically.