78 Intelligence and Miscellaneous Articles. 



XII. Intelligence and Miscellaneous Articles. 



THE TELESCOPIC STEREOSCOPE. 



To the Editors of the Philosophical Magazine and Journal, 

 Gentlemen, 



PERHAPS you will allow me a corner in your next Number to 

 say that I have recently succeeded in constructing what I 

 believe to be a new form of the stereoscope. Its object is to unite 

 large binocular photographic pictures in a different way from any 

 that has hitherto been followed. 



The pictures are placed side by side, and viewed through two 

 small telescopes, like those of opera-glasses, with the directions of 

 their axes crossing each other; the left-hand picture being viewed 

 with the right eye, and the right-hand picture with the left eye. The 

 two telescopes are connected together, the connecting apparatus 

 being capable of two adjustments ; one to suit the width of the eyes, 

 and the other to give the obliquity required. When the instrument 

 is placed on a stand, as I have it, two other adjustments are required ; 

 the first to bring the telescopes to the proper elevation, and the second 

 to bring the plane of their axes into parallelism with the upper or 

 lower margins of the pictures. 



The instrument is constructed in such a way that these adjust- 

 ments are made with great facility ; and when the pictures are united, 

 the effect is excellent. • 



If you have any reason to suppose that the instrument is not new, 

 I will thank you to commit this to the flames ; but if otherwise, I 

 will trouble you with a more comlpete description in your succeed- 

 ing Number. 



In the mean time, on the supposition that I have the priority in this 

 instance, I propose to call the instrument the Telescopic Stereoscope. 



I need scarcely say that the pictures to be viewed are transposed 

 from their usual position when viewed in the lenticular stereoscope, 

 that which usually occupies the right side being placed on the left. 



Of course the telescopes must be of the same magnifying power, 

 and in every respect alike. 



I am, Gentlemen, 



1 St. Vincent Street, Edinburgh, Your obedient Servant, 



December 12, 1836. James Elliot. 



ON THE COLORATION OF THE MOON DURING ECLIPSES. 

 BY M. FAYE. 



It is well known that the portion of the lunar disc which is im- 

 mersed in the cone of the shadow of the earth still receives rays 

 refracted by our atmosphere, and that it then appears tinted with a 

 copper-red, or rather brown, the shade of which is rather difficult to 

 define. 



The last eclipse has given me the opportunity of ascertaining that 

 this tint is not real, or at least that it is greatly altered by an effect 

 of that simultaneous contrast of which Chevreul has made known 

 the laws, and of which he has lately brought an interesting example 

 before the Academy. It was sufficient for me to cover the non- 



