...see, or fancy he saw, lines and markings upon its surface similar to those of Mars. This phenomenon is not to be regarded as a pure illusion on the one...representation of objects on the other. It grows out of thft spontaneous action of the eye in shaping slight and irregular combinations of light and shade,...

...Cerulli, and supported by Newcomb and Maunder. On the basis of the illusion theory, Newcomb explains that the " canaliform " appearance " is not to be...minute to be separately made out into regular forms." Experiments were made by Maunder in 1902, and the results pointed to the truth of the theory that the...

...canals of the planet. Flammarion tried similar experiments with negative results. According to Xewcomb the canaliform appearance " is not to be regarded...minute to be separately made out, into regular forms." A further strong argument against the reality of these canal-like forms is the fact that similar lines...

...the "optical illusion" theory. Professor Newcomb says of the canaliform appearance : "This phenomenon is not to be regarded as a pure illusion on the one...minute to be separately made out into regular forms." This view has been extended by Mr Maunder and M. Antoniadi, but it received a severe blow when Professor...

...supported by Professor Simon Newcomb, who thus explains the " canaliform " appearance : " This phenomenon is not to be regarded as a pure illusion on the one...minute to be separately made out, into regular forms." A series of experiments made by Mr. Maunder in 1902 and 1903 were described by him in Kiwwledge for...

...see, or fancy he saw, lines and markings upon its surface similar to those of Mars. This phenomenon is not to be regarded as a pure illusion on the one...or an exact representation of objects on the other. !{. u;rmvs out of the spontaneous action of the eye in shaping slightjind irregular combinations of...

...Cerulli, of Teramo, developed by Newcomb and championed by Maunder, that the phenomenon of the canals " grows out of the spontaneous action of the eye in...minute to be separately made out, into regular forms." This theory had a certain vogue for a considerable time, but it may be said to have been discredited...

...pure illusion nor an exact delineation of objects as they actually are. He considers them due to a "spontaneous action of the eye in shaping slight and...minute to be separately made out into regular forms." Assuming the relative intensities between areas of light and shade dependent on seasonal change, this...