190 S. P. Sadtler on Fischer's Salt. 
or as we shall write it €0,6N90,.+6(KN9,)+3H,0. Braun* the 
last writer on the subject, passes most of the preceding work in 
review. e takes up Spa be results, and rejecting his 
views as to the composition of the salt analysed by him, figures 
for it a number of ingenious but somewhat complicated form- 
ul e considers that neither the “neutral salt” nor the 
“acid salt” of Erdmann can be regarded as anything but mix- 
tures or ‘‘ poly combinations,” and for the first of them con- 
sidered as such he gives a still more ingenious and com- 
plicated formula. e quote it as reduced to its empirical 
form by Blomstrand :+ CogKs9N 12H O.,.t ~Braun’s own results 
are exp first by a formula containing both €0,03 and €09, 
then by one containing €0,9;, €00, N,@, and N,@, and finally 
by the following : . 
3(€0,85, 3N,0;+4K,9, 4N,9;,4+2H,0)+2(€0,0s, H,98, 2N,03+ 
K,0, N.O,+3H,9). 
The experiments made to settle its composition and the results 
i ited the salt in a stream 0: 
nitrogen. Nitric oxyd was given off and the residue was @ 
€o,9, which dissolves in €,H,®, with a brown, 
€,H20, with a green color. This observation is of undoubted 
NaH®0,BaH,9,, €: , 
ack hydrated €0,03 This is confirmatory of Stromeyers 
: : t ( 
‘* Zeitsch. Anal. Ch., vii, 313. _ Chemie der Jetztzeit, p. 414. 
$ Should be 0 608.” es oe 
