Proceedings of the PoLVTEcnyic AssociATioy. 829 



be found in tlie lunar pliotograplii?. Add to this the fact that ahnost 

 every observer states, tliat upon clear niglits and under favorable 

 circumstances, they have detected decided green tints in the darker 

 portions of those dark regions. Even Beer and Madlei', who were 

 almost bitterly opposed to Shroter's speculations as to the moon 

 being inhabitable, testify, upon numerous occasions, to having 

 received decided impressions of green from various portions of the 

 dark regions. 



Every landscape painter knows that all color lades into gray as the 

 distance from the eye increases ; consequently, it would be in exact 

 accord with our experience if the local color of the moon failed to 

 reach us ; but as that color is of a nature which absorbs the actinic 

 ray to a greater extent than it does the luminous, it tells us in very 

 plain chemical language, that it is not what it seems. Hence, it is 

 almost certain, that Ave have never seen the moon as it really is, and 

 that therefore our assumptions as to its true character have all been 

 premature. 



As the creation of that body must have been coincident with and a 

 part of that of our earth, it follows that we cannot rationally hope to 

 solve the problems of this Avorld without knowing more about that. 



Here, then, we have an attendant planet constantly accompanying 

 us in our wanderings through space, whose ftite is identified with our 

 own. Its distance from us is no greater than may be traveled b}^ 

 ordinary railroad time in seven or eight months ; yet with the tele- 

 scope in our possession capable of unlimited improvement, our knowl- 

 edge of that kindred world is still about as dark as her own eclipse. 



Binocular Teltoscope. 



Mr. Charles B. Boyle, after reading his paper, exhibited an 

 improved telescope for comet searching, having two eye pieces, each 

 of which can be adjusted to a different focus, whereby double the 

 field of an ordinary telescope is presented to the eyes of the observer. 



Prof. J. A. Whitney, after a few appropriate remarks, moved that 

 a vote of thanks be tendered to Mr. C. B. Bojde for his elaborate 

 and interesting paper, and the beautiful model of the moon shown 

 now and at the last meeting, which so clearly illustrated his remarks. 



Mr. P. V. Hicke}', after adding some further commendatory 

 remarks, seconded the motion, Avliich was carried unanimouslv. 



