118 ON THE USE OF LACTATE OF IRON. 
residual volumes. The gas created in either of the modes 
above mentioned does not contain carbonic acid, and when ge- 
nerated from olefiant gas, appears by analysis to yield the same 
quantity of carbon and hydrogen as that gas affords before ex- 
pansion. 
These facts point out a source of error in experiments for 
analyzing gaseous mixtures by ignition with oxygen or hydro- 
gen, in which the consequent condensation is appealed to as a 
basis for an estimate. It appears that the resulting water may 
form new products with certain volatilizable substances which 
may be present. 
ART. XIX.— ON THE USE OF LACTATE OF IRON. 
By MM. Gelis and Conte. 
{Report made on this paper to the Academy of Medicine, by MM. Fouquier, 
Bally and Bouillaud. 
The Academy of Medicine, at its meeting on the 4th of 
February last, received a report from MM. Bally, Fouquierand 
Bouillaud upon a paper of MM. Gelis and Conte, having for 
its subject the Lactate of Iron, and its properties as a thera- 
peutic agent ; we propose to present here an account of this pa- 
per and the report upon it. 
MM. Gelis and Conte first pass in review the ferruginous 
preparations employed in medicine ; there are none, in their 
opinion, even among the most recent and best accredited, but 
leave much to be desired. The lactate of the protoxide of 
iron appears to them to possess a superiority over every other 
preparation, and this they endeavor to establish by the follow- 
ing considerations : 
All modern authors who have attended to the ferruginous 
preparations, and the forms under which they can be adminis- 
tered, propose for their object to present the iron in such a 
