Antimony in the organs and tissues. 279 
on discontinuing the current. The antimony was then finally washed 
with alcohol, any adherent sulpbur lightly brushed off and the dish 
dried and weighed. 
Following are some of the preliminary results obtained : 
Standard Sb Theoretical Am’t Sb Duration 
Solution. Am’t Sb. found. of Klectrolysis. 
50 c. c. 0-0875 gram. 0:0375 gram. 16 hours. 
10 0:0075 0:0077 18 
10 0:0075 0:0075 24 
10 0:0075 0-0078 18 
10 0:0075 0:0074 8 
2 0:0015 0-0012 10 
0:00075 0:0008 3 
These results showed the method to be perfectly satisfactory for 
our purposes, and we, therefore, next tried the separation of small 
amounts of antimony from organic matter, and its final recovery by 
the above method. 
As there was no doubt that large amounts of antimony could be 
satisfactorily recovered from organic matter, our experiments were 
confined mainly to very small quantities. In each experiment, 100 
grams of either liver or beef were finely divided and to the so-pre- 
pared tissue, a few cubic centimetres of the standard antimony solu- 
tion were added and the mixture thoroughly oxidized with hydrochlo- 
ric acid and potassium chlorate. After removal of all free chlorine 
from tke filtered fluid, by careful heating, the antimony was precipi- 
tated by hydrogen sulphide. This precipitate, which naturally con- 
tained, in addition to the sulphide of antimony, considerable sulphur 
and some organic matter, was then treated as follows: While still 
moist, after being freed from all hydrochloric acid by thorough wash- 
ing, it was dissolved in the cold sodium monosulphide solution and 
then directly subjected to electrolysis. At first, we thought it nec- 
essary to free the precipitate from its excess of sulphur and organic 
matter by solution in ammonium sulphide, evaporation, fusion with 
potassium carbonate and nitrate, etc., obtaining it finally in the form 
of sulphide again, free from its former impurities. This, however, 
we found to be unnecessary ; in fact the loss was far greater than the 
gain. Provided the oxidation with potassium chlorate be a thorough 
one and the free chlorine entirely removed from the solution, the 
first hydrogen sulphide precipitate is well adapted for electrolysis 
directly. It was found best, however, to keep the solution on the 
battery until all of the sulphur and organic matter was oxidized ; 
that is until the reaction of the fluid had become acid. This took, 
