Abstract

The writer and senior students at Adelaide University have for some time been using nomograms for correcting the angle of tilt on the universal stage when the refractive index of the mineral differs from the refractive index of the hemisphere. Unlike the Federow diagram (cf. Emmons, 1943, plate 8) a separate nomogram must be used for each hemisphere.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not currently have access to this article.