Microscope Illumination and Fatigue

Abstract

MR. BARNARD'S letter in NATURE of December 29 last, p. 566, is unusually dogmatic as a contribution to a scientific discussion. As the title of this correspondence indicates, the original letter was written, not so much to direct attention to a particular method as to a general principle, with the intention of increasing the comfort of workers who have to work long hours at the microscope. It appears that Mr. Barnard has arrived at the same principle independently, but in a case of this nature there is no excuse for withholding, from publication a matter which affects the well-being of a large number of workers.