SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 7 
Is Mars an Inhabited World? 
By Wm. H. Knight. 
At the last ‘“‘favorable’’ opposition of Mars, which oe- 
eurred in the months of June and July 1907, that planet ap- 
proached within 38,000,000 miles or the earth, and shone the 
most resplendent object in the nocturnal heavens. It was at 
Reproduction by permission of a fine drawing from a photograph of the planet 
Mars, taken at the Lowell Observatory, Flagstaff, Ariz., during the ‘favorable 
opposition”’ of 1907, under the direction of Dr. Percival Lowell. 
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a-similar opposition in August, 1877, that Asaph Hall diseov- 
ered the two minute satellites of Mars, and Schiaparelli first 
discerned the so-called canals on its surface. But even the 
existence of these lines was doubted by less sharp-sighted as- 
tronomers till, in the favorable opposition of 1892, more power- 
ful instruments confirmed Sehiaparelli’s observations. The 
