Intelligence and Miscellaneous Articles. 397 



action which it is not easy to foresee. We hope for more definite 

 information upon the subject. 



A curious subject of inquiry presents itself in regard to those 

 bases which contain two and three equivalents of the alcoholic ele- 

 ments. If the decomposition were to take place in accordance with 

 the formula above given, nitrate of biaethylamine would yield C 4 H 10 O, 

 which is the aether of alcohol, or its isomer butyric alcohol, and 

 tria:thylamine, C 6 H l4 0, which is the formula of caproic alcohol. 

 The decomposition of all the complex alkaloids by this reaction will 

 be of great interest. — Sillirnan's American Journal, March 1852. 



THE STEREOSCOPE. 



To the Editors of the Philosophical Magazine and Journal. 



Gentlemen, > 



Having this day seen, in your publication of this month, Pro- 

 fessor Wheatstone's communication regarding the "Physiology of Vi- 

 sion " and his recently produced instrument, the Stereoscope, I may 

 perhaps be permitted to say that neither his views, nor the practical 

 application of them, are so new as he supposes, since I constructed 

 a stereoscope, in everything but the name, more than thirteen years 

 ago, which, though since neglected by me, is still in existence, and 

 can be produced, with evidence of its date. 



I do not state this with a view to detract at all from the merit or 

 originality of Professor Wheatstone's invention, as mine was never 

 made public. I mention the circumstance rather as a curious fact 

 than anything else. 



I am, Gentlemen, your obedient Servant,^ 



James Elliot. 

 1 St. Vincent Street, Edinburgh, 

 April 5th, 1852. 



ON THE ARTIFICIAL PRODUCTION OP CRYSTALLIZED TTJNGSTATE 

 OF LIME. BY N. S. MANROSS. 



Tungstate of lime, which occurs so beautifully crystallized as a 

 mineral, and is known in this form under the name Scheelite, 

 when prepared artificially by the mutual decomposition of a solu- 

 tion of an alkaline tungstate with a salt of lime, is only obtained 

 in the form of a white powder. I have found that it may be procured 

 in crystals allowing of measurement, by the mutual decomposition 

 of the salts, not in an aqueous solution, however, but in a melted 

 state at a high temperature— a method of crystallizing compounds 

 Which I have also begun to apply with favourable results to other 

 bodies, especially those which occur crystallized as minerals*. 



To procure tungstate of lime in a crystalline state, anhydrous 



* I must remark, that M. ManrOM had arrived at tliis method before he 

 hid any knowledge of the very interesting experiments of Ebehueu in the 

 same direction. — Wohler. 



