Letter | Published:

The Variable Star Z Herculis

Nature volume 54, page 595 | Download Citation



IN the issue of NATURE for October 1, a note appears on the above variable, containing some important remarks on the general practice of smoothing curves, and rejecting outstanding observations. I fully agree with Mr. Yendell, that by carrying out this practice unduly, much valuable information may be lost. During eleven years' continuous observations of long-period variables, I have not rejected a single observation, and my light curves are produced by simply plotting down the observations (each of which is the mean of five comparisons with stars of known magnitude) on a squared form, and joining the dots by straight lines. The result has been to abundantly prove the existence of very many secondary and minor variations, both in the rise and fall of nearly all the stars under observation.

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  1. Rousdon Observatory, Lyme Regis, October 12.



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