424 Scientific Intelligence. 
weather, and the sky had that morning become clouded with forms of 
clouds eminently electrical. 
appily the thunder storm did not break in this neighborhood, being 
wafted away elsewhere; but had it broken — the photograph tells ex- 
the lightning was preparing to e down; and there is one 
tall iron chimney in the view, with the aiegias ray of the whole above 
it, showing that that would certainly have been struck in preference to 
its neighbors, and, if unprovided with metal communication to the eart 
and water, would infallibly have caused mischief to the house to which it 
is attached. 
I have sent a second plate, taken six days afterward, when east wind 
and rain had disposed of all the electricity that had been brewing in the 
air; and af will be seen that, although it is the same view, taken with 
the same camera, and with the same sort of tannin dry plate, there are no 
electrical Serathieg, or black rays, surmounting the chimney pots.— ritish 
Journal of Photography. 
II, MINERALOGY AND GEOLOGY. 
1. On Meteoric Irons ; by H. Hatpixcer.—Haidinger presents gocd 
reasons for considering the metallic iron of Robitzan, another found near 
Kremnitz in Hungary, and another from the vicinity of Cotta in Saxony, 
as _ bably not meteoric. 
e next describes a Meteoric iron from Copiapo. Although i iron pre- 
dominates in it, it consists largely of stony material, and is actua lly a 
brecciform rock—an agglomeration of fragments, ts, about and in the inter- 
stices of which the iron is spread as if it had ae introduced in a liquid 
or pasty state. The stony pieces vary in siz m that gra 
sand to half an inch, Meteoric pyrrhotine * iroilte of Haidinger is 
mixed with the silicates in pieces sometimes a quarter of an inch y i- 
ameter. There is also some graphite. Nickel constitutes 6°4 p. c. of the 
metallic part. 
From the writings of sda ae t and Domeyko, it appears that 
there are numerous blocks of meteoric iron over the Chilian territory and 
ep through the desert region ‘of Atacama. Prof. Joy has analyzed 
e found in the Andes, 50 English miles from Copiapo. His results 
dite Ssinlsidty from those obtained by Prof. G. Rose for a meteoric iron 
n the Sierra of Chaco, sent by Tewiayko to the Berlin Museum (Mo- 
ie, Acad. Berlin, Jan. 15, 1864). An abstract of the memoir of Do- 
meyko on the meteoric irons of Chili is given in the Comptes Rendus, 
March 8, 1863 
The paper takes up next the Jron of Sarepta, Southern Russia. The 
surface of a plate cut from this iron, examined by reflect ted light, shows 
a structure distinctly crystalline-granular, like that of the meteoric iron 
of Arva (Northern Hungary). An analysis afforded Iron 95° 937, schrei- 
bersite 1-315, tin 0-017, silicium 0-820. cares patna July 28, 1864, - 
4 ae adi iile she Ber. Wien, Akad., May 12 
2. On artificial Anatase, Brookite, and Rutile ; . by Mr. HavrErevrLye. 
-The dry 1 | of forming crystallized titanie acid adopted by a 
2 consisted in dissolving the titanic acid in an alkaline fluorid, oF 
of calcium, alone or mixed with silica, and submitting nal 
