Mie eae 
, = 
| Chemistry and Physics. 267 
grams ! ‘Mercury are usually employed. In this manner the following 
lensities were determined i 
Sesquichlorid of aluminum in the va 
mercury 9°35; in the vapor of sulphur 9°34: the calculated density (Ale 
i found to 
een the atomic weigh bodies belonging to the ame natural 
Troup. The author gives the following as the results of his numerical 
terminations : 
Silver, 108 Fluorine, 19 Tungsten, 92 
Chlorine, 35+5 Selenium, 40 Manganese, 26 
Bromine, 80 Tin, 59 oron, 11 
Iodine, 127 Molybdenum, 48 Silicon, 21. 
Sulphur, 16 
~ equivalent of silver was calculated from Marignac’s analyses by tak- 
an mtrogen = 14 and oxygen== 8. To determine the exact number for 
= orme the author heated weighed quantities of silver in a current of 
chlorine gas, maintaining the temperature until the resulting chlorid was 
Md. These numbers agree with those found by Mangnae. ui 
lent of fluorine was determined by the analysis of a very pure native 
‘Wor spar as well as by that of crystallized fiuorids of sodium and potas- 
Sm. The number 16 for sulphur was verified by burning a know 
p by the 
‘mploy a purer selen nd hive 
method of Berzelius, that is to say, by heating the bichlorid with nitric 
a : Seas seca 
ited in a mat- 
Units from that of d Struve who found 45°92, and from that 
of Berlin whe agin Pega g.] The equivalent of tungsten was 
