Historical information

Made by Henry Grayson at home with the help of William Stone. Used to rule diffraction gratings, achieving excellent results of 2cm squared rulings on speculum metal. The instrument was transferred to Melbourne University, and used by Professor Lyle from 1917-30. Information attached to the front of object and statistical information on stand on top of object.

Physical description

Grayson Diffraction Grating Ruling engine consisting of multiple complex chrome and brass components. Enclosed in specially made glass and wooden display box.