... it to be easily worked toward all the points of the heavens, and to follow the stars from the one horizon to the other duringtheir journey through the heavens.103It had cost $400,000. The ... as to the best form and principle of the proposed instrument the work was finally commenced. According to the 102calculations of the Observatory of Cambridge, the tube of the new re-flector ... enclosure, then, after a certain time, all the oxygen of the air will be replaced by the carbonic acid— a gas fatal to life. There were two things to be done then— first, to replace the ab-sorbed...