Published online by Cambridge University Press: 01 January 2025
When a new reference vector is chosen graphically from the plane of two old ones, its direction cosines as well as the projections of the tests on it are most easily computed by applying certain multipliers d and Sd to quantities which are already known. The nomogram quickly supplies d, after S has been read from the graph.
Suggestions by Norman Livson, Thomas Nichols, and Karyl Atherton have been incorporated in the nomogram. Mrs. Atherton also checked the necessary computations. In addition, I am obligated to Katherine Eardley, scientific illustrator, for her care in lettering and inking the original.