...himself : six more years to satisfy, and still thirteen more to convince, mankind. For thirty yearsnever has the Sun exhibited his disc above the horizon of...that appears to have happened on an average about 300 daysa year." And then follows a paragraph on which I need make nocomment ; it is sufficient to remember...

...and still thirteen more to convince, mankind. For thirty years never has the Sun exhibited his disk above the horizon of Dessau without being confronted...imperturbable telescope, and that appears to have happened on the average about 300 days a year. So, supposing that he observed but once a day, he made 9000 observations,...

...him. The president said, in the course of his address, on this occasion : " Twelve years he (Schwabe) spent to satisfy himself — six more years to satisfy,...telescope, and that appears to have happened on an average of about 3oo days per year. This is, I believe, an instance of devoted persistence unsurpassed in the...

...Society summed up the magnitude of his feat: For thirty years never has the Sun exhibited his disk above the horizon of Dessau without being confronted by Schwabe's imperturbable telescope — This is, I believe, an instance of devoted persistence unsurpassed in the annals of astronomy....