378 Intelligence and Miscellaneous Articles. 



The following crucial experiment was made on one of these pic- 

 tures. It was suspended for twelve months in the open air, under 

 the principal chimney of the New Museum at Berlin ; " during that 

 time it was exposed to sunshine, mist, snow, and rain," and never- 

 theless " retained its full brilliancy of colour." 



The stereochrome has been adopted on a grand scale by Kaulbach 

 in decorating the interior of the great national edifice at Berlin 

 already alluded to. These decorations are now in progress, and 

 will consist of historical pictures (the dimensions of which are 

 21 feet in height and 24|- in width), single colossal figures, friezes, 

 arabesques, chiaro scuro, &c. On the effect of the three finished 

 pictures, it has been remarked by one whose opinion is entitled to 

 respect, that they have all the brilliancy and vigour of oil paintings, 

 while there is the absence of that dazzling confusion which new oil 

 paintings are apt to present, unless they are viewed in one direction, 

 which the spectator has to seek for. 



Mr. A. Church has suggested that if the surface of oolitic stones 

 (such as Caen- stone) is found to be protected by the process already 

 described, it might be used, as a natural intonaco, to receive coloured 

 designs, &c. for exterior decorations ; the painting would then be 

 cemented to the stone by the action of the water-glass. 



Mr. Church has also executed designs of leaves on a sort of terra 

 cotta, prepared from a variety of Way's silica rock, consisting of 75 

 parts clay and 25 of soluble silica. This surface, after being hard- 

 ened by heat, is very well adapted for receiving colours in the first 

 instance, and for retaining them after silication. 



LIX. Intelligence and Miscellaneous Articles. 



ON A NEW METEORITE FROM NEW MEXICO. 

 BY DR. F. A. GENTH. 



1AM indebted to Prof. Joseph Henry, Secretary of the Smith- 

 sonian Institution, for a small piece of an interesting meteorite 

 from New Mexico. It was labelled " native iron," and is said to occur 

 there in large quantities. Fortunately it was just sufficient for an 

 examination, the results of which I here give. There is no doubt 

 that the mineral is of meteoric, and not of telluric origin. 



It is very crytalline, and shows a distinct octahedral cleavage. Its 

 colour is iron-gray, its lustre metallic. Quite ductile. Spec. grav. 

 (at 18°Cels.)=8-130. 



Dissolves readily in diluted nitric acid, leaving a small quantity 

 of insoluble residue, which, however, was also slowly dissolved by 

 strong nitric acid or aqua regia, but still more easily by fusion with 

 bisulphate of potash. 



The methods used for its analysis were the following : — In ana- 

 lysis I. the meteorite was dissolved in strong nitric acid ; nickel and 

 cobalt were separated from iron by carbonate of baryta ; nickel and 

 cobalt were separated by hydrocyanic acid, potash, and oxide of 

 mercury. 



In analysis II. the meteorite was dissolved in diluted nitric acid 

 and the residue filtered off on a weighed filter. In the filtrate, iron 



