740 
FACTS AND OBSERVATIONS. 
hypothesis of Dr. Andrews that a molecule of ozone is com- 
])osed of several atoms of oxygen. Me supposes that one 
molecule of ozone is made up of three atoms ofoxygen^ con¬ 
stituting a binoxide of oxygen. In the formation^ two atoms 
already united to form a molecule of free oxygen, represent¬ 
ing two volumes, combine with another atom representing 
one volume to make a molecule of ozone, representing two 
volumes. 
His hypothesis will explain the oxidising properties of 
ozone, and the constancy of volume when treated with oxidi- 
sable bodies, as well as the expansion under the influence of 
heat, and the contraction oxygen undergoes by the action ot 
electricity. 
Test for Ozone. —Strips of paper moistened with pyro- 
gallic acid become brown on being exposed to the action 
of ozone. 
A New Metal. —Messrs. Reich and Richten announce 
the discovery of a new metal by them, to which they have 
given the name of Indium, on account of its giving an indigo- 
blue line in the spectroscope. It was obtained by them 
from two Frieberg ores, and at first suspected to be thallium; 
no green line, however, was seen, but instead thereof a bril¬ 
liant, sharp, and persistent blue line; the inference, there¬ 
fore, was, it belonged to a hitherto unrecognised metal. 
Nerve Cells. —Mr. Lionel Beale’s researches lead to 
the conclusion—1. That in all cases nerve fibres are in bodily 
connection with the cell or cells which influence them, and 
this from the earliest period of their formation. 2. Tliat 
there are no apolar cells, and no unipolar cells in any part of 
any nervous system. 3. That every nerve cell, central or 
peripheral, has at least two fibres connected with it. 
Titanium in Iron. —Mr. E. Riley makes known a fact 
which appears not to be generally known, namely, that tita¬ 
nium exists in pig iron, and especially in the soft hccmatite 
ores. Its presence is an advantage, as it gives to iron the 
character of steel. This has been long noticed in the haema¬ 
tite and Forest of Dean ores, which are so valuable in the 
market, although the cause of their superior quality had not 
been before ascertained. 
Formation of Nitrite of Ammonia. —M. Sehben- 
bein states that if into a platinum capsule heated so high 
