A MICROSCOPE EYEPIECE GRATICULE FOR THE EVALUATION OF FIBROUS DUSTS
W. H. Walton, Stephen T. Beckett · The Annals of Occupational Hygiene · 1977
A A microscope eyepiece graticule has been designed specifically to help in the counting of respirable fibrous dust. This is now in use in a number of laboratories and has been found to have several advantages over conventional designs, in particular when determining the length and diameter of fibres.