The Solar System; Six Lectures Delivered At the Massachusetts Institute of Technology in December, 1902
The Solar System; Six Lectures Delivered At the Massachusetts Institute of Technology in December, 1902
Lowell Percival
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Schiaparelli retired practically in 1892, though not formally till a little later. His work was taken 56 The Solar System up by other hands, and the impetus he gave the matter has resulted in a knowledge of Mars which has quite revolutionized even the conception he bequeathed of the planet. Methods of Before proceeding to post-Schiaparellian work, o servation. .^ ^^^ interest you to know how the phenomena in question have been detected, and what they look like when seen. Contrary to what the la...yman thinks, the size of the instrument is the least important factor in the process. As in most things, the man is the essential machine ; and next in desirability to the presence of man is the absence of atmosphere. In good air, with fair attention, the canals are not very difficult objects. Indeed, the surprise is that they were not detected long ago. Under suitable atmospheric conditions a four-inch glass will show them perfectly. Steady air is one essential ; steady study another. The canals.
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