330 
POPULAR SCIENCE REVIEW. 
triolet lines of wave lengths 417 and 404 respectively. In all its other 
chemical reactions it closely resembles zinc ; though in the precipitations it 
has always the preference when these are incomplete. To the metal thus 
indicated, Lecocq de Boisbaudran gave the name “ Gallium.” In a more 
recent paper he gives additional facts regarding the new metal, which he 
has been able to free almost entirely from zinc. 
METEOROLOGY. 
The great Iowa Meteor . — An account of this very large stone is given by 
the u Boston Journal of Chemistry,” in the following terms : — a Some time 
ago a meteor of extraordinary splendour appeared in the heavens, over the 
State of Iowa, and after dazzling the eyes of all those who were so fortu- 
nate as to see it, burst asunder with a loud report, and in a few seconds 
disappeared. Fragments of this meteoric mass were scattered over a wide 
-extent of country, and more than 700 pounds have up to the present date been 
picked up by various persons, and sold to geologists, chemists, and others, 
at high prices. We are under great obligations to 0. W. Irish, Esq., 
•civil engineer, of Iowa City, for a splendid specimen of the stone, which he 
kindly sent to us last autumn. The specimen weighs about 11 ounces, and 
^accompanying it was a small fragment, which was sent for chemical 
examination. Our time has been so occupied that we have not been able 
to bestow upon it analytical labour, but intend shortly to do so. We pre- 
sume, however, that it does not differ essentially from the specimens 
examined by Professor Henrichs, and we present in tabular form his 
results : — 
Meteorites 
s 
Nickel 
Sulphur 
Ferrous 
Oxide 
Magnesia 
Lime 
| 
3 
m 
Non-Magnetic : 
Triolite .... 
1-1 
— 
0-7 
(1-5) 
— 
— 

1*8 
Hyalosiderite . . 
— 
— 
— 
15-2 
17-5 
0-6 
19*6 
52-9 
Hypersthene . . . 
— 
— 
— 
8-8 
9*7 
2*2 
24-2 
44-9 
Loss, traces . . 
0-4 
Sum 
1*1 
— 
0-7 
240 
27*2 
2-8 
43-8 
1000 
Magnetic : 
Nickeliferous Iron . 
(3*6 
0-9 
— 
— 
— 
— 
— 
7-5 
Total .... 
7-7 
0-9 
0-7 
24-0 
26*2 
2-8 
43-8 
107-5 
The stone, in physical appearance, resembles in most respects those which 
have fallen upon other parts of our planet, but in chemical composition it 
varies essentially. It is covered with a black crust, formed during the cos- 
mical part of its motion through the earth’s atmosphere. This crust, in the 
view of Professor Henrichs, is not due to fusion, but simply to the heating 
of the outer layer of the stone to a red heat. The interior is of a greyish 
colour, and resembles iron stones of terrestrial origin ; when exposed to a 
red-heat the colour is changed to a black like the crust.” 
