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POPULAR SCIENCE REVIEW. 
passing chlorine gas over a calcined mixture of beryl, oil, and lampblack. 
(2) By treating beryl with concentrated hydrofluoric acid and sulphuric 
acid. (3) By digesting seven parts of beryl and thirteen parts of fluor- 
spar in eighteen parts of concentrated sulphuric acid. (4) By fusing 
beryl with three parts of fluoride of potassium, and digesting in sulphuric 
acid. (5) By fusing beryl with fluoride of ammonia and digesting 
in sulphuric acid. (6) By digesting fifty parts of beryl in thirty parts of 
sulphuric acid, and fusing with one hundred parts of ferrocyanide of 
potassium, and seventy parts of chloride of sodium. (7) By fusing beryl 
with fluor-spar. (8) By fusing beryl with binoxide of manganese. 
(9) By fusing beryl with three parts of carbonate of potassa and two of 
carbonate of soda. (10) By fusing beryl with half its weight of caustic 
lime. (11) By fusing beryl with litharge. (12) By fusing beryl with 
two parts of carbonate of potash. 
NicJcel and Cobalt in Ironstone . — As an instance of the very general 
distribution of rare minerals, Mr. Pattinson’s remarks on this matter are 
interesting. In a series of analyses of the Cleveland ironstone and ores, he 
found that both nickel and cobalt are present in the following pro- 
portions : — In a pound of ironstone there are 0*72 grains of nickel, 
and 042 of a grain of cobalt. Pig-iron contains 0*027 of nickel, and 
0*004 of cobalt, per cent. In malleable iron there are 0*022 of nickel and 
0*003 of cobalt. Although the admixture of nickel with iron is said to 
improve the quality of the latter, the proportions here present are evidently 
too small to influence the nature of the metal. 
Characters of Schreibersite. — In a memoir read before the French 
Academy, on the 16th of November, M. Faye described the character 
of this mineral, and showed how he produced an artificial compound 
having most of its properties. Schreibersite is a mineral found in meteoric 
stones, and presents itself in the form of small scales or yellow fragments, 
with a metallic lustre like magnetic pyrites, with which it is often 
confounded. It does not present the slightest trace of crystallization. 
It is attracted powerfully by the magnet, and then acquires a per- 
manent polarity; it is unaffected by hydrochloric acid. According to 
Professor Smith, of the United States, its atomic formula is Ni a Fe 4 P. 
It is to it alone that the phosphorus of meteorites is due. The method 
adopted for its reproduction artificially by Mr. Faye w r as as follows : — 
Fixed quantities of oxide of nickel and sesquioxide of iron were mixed 
with silica, phosphate of soda, and carbon reduced. The mixture, con- 
tained in a charcoal crucible enclosed in an earthen one, was brought to a 
white heat. In a portion of the resulting mass was found a quantity of 
yellow particles, with a bright metallic lustre, strongly attracted by the 
magnet, and quite unaffected by either hot or cold hydrochloric acid ; in 
fact, the resulting substance possessed all the characters of Schreibersite. 
PHOTOGRAPHY. 
“ The Watt Photographs .” — For some months past a mysterious 
story has been afoot that certain pictures — in one case resembling 
