The observational data used by Freundlich in deriving the numerical constant in his proposed red-shift law are critically discussed in the light of the most recent information available. Some of the astronomical data used by Freundlich to adduce support for his proposed law are also critically discussed. Apart from the term due to the gravitational red-shift, it is shown that all the spectral line- shifts considered by Freundlich can be accounted for by relative motions of stars or by motions within stellar atmospheres.

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observational gravitational redshift numerical constant motions within stellar atmospheres astronomical data relative motions of stars spectral line shifts

E. Margaret Burbidge & G.R. Burbidge,.CXII. On the observational data relating to Freundlich's proposed red-shift law. 45 (369),1019-1022.

E. Margaret Burbidge & G.R. Burbidge,"CXII. On the observational data relating to Freundlich's proposed red-shift law" 45

E. Margaret Burbidge & G.R. Burbidge,"CXII. On the observational data relating to Freundlich's proposed red-shift law"