"The discovery of variable stars, at this Observatory and elsewhere, has progressed so rapidly during the last five ye…"

"Apparently no sharp dividing line can be drawn between true Algol stars and those whose variations are continuous. Pe…"

"The range of H 1255 is only four tenths of a magnitude, and on account of its brightness it is difficult to observe o…"

"A remarkable relation between the brightness of these Cepheid] variables and the length of their periods will be noti…"

"Since the Cepheid] variables are probably at nearly the same distance from the Earth, their periods are apparently as…"

"It is to be hoped, also, that the parallaxes of some variables of this type may be measured."

"It is hoped that systematic study of the light changes of all the variables, nearly two thousand in number, in the tw…"

"A determination of the visual magnitudes of the stars had a very large place in the work of the Observatory during th…"

"About 1906 a Durchmustering of variable stars was proposed at the Harvard Observatory. Somewhat later this was undert…"

"It is worthy of notice that in Table VI the brighter variables have the longer periods. It is also noticeable that th…"