Errata: "An Introduction to the Sequence Rule" The following corrections should be added to the article "An Introduetion to the Sequence (March), 41, 116 (1964). Rule" by R. S. Cahn, THIS JOURNAL, Page 118 righehand column, line 7 up: Bfter o z y g a branch add at each successive step. Page 119 The whole text concerning example (20) is wrong and the right-hand part of the d i a gram should he
b-~le
20 R
d The correct procedure is to work outward by single groups along all branches simultaneously; a t the first step along the branches one finds CH.OH and CH. in each ligand; st the second step one finds CHC1, CH. on the right-hand and CH*, CH2on the left. Thus the right-hand ring hae precedence (not the left as stated), the CI being decisive.
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