On the Existence of Lead in the Atmosphere. 339 
To this we may add, that this alcoholic liquid, recommend- 
ed instead of water, in the treatment of substances, and in- 
tended for the preparation of syrups, acts on those substances 
in a very different manner from pure water, and furnishes 
syrups of a different composition, from those made with the 
juices of plants or their aqueous decoctions. 
Journ. de Pharm. 
ART, LX. — EXPERIMENTS TO ASCERTAIN THE EXISTENCE 
OF LEAD IN THE ATMOSPHERE OF A WHITE LEAD MANU- 
FACTORY. By Arthur Dunn. 
Having witnessed at my manufactory, the frightful effects 
of white lead on the workmen employed, I was anxious to de- 
termine if it was possible for lead to exist in the atmosphere, 
and, through that medium, be absorbed into the system by the 
action of the lungs. For this purpose I made the following 
experiment, which certainly is important to the manufacturer, 
as it points out a serious evil to be guarded against. I shall 
now merely confine myself to the results obtained, and leave 
to some of your more scientific friends, any theoretical rea- 
soning, or practical hints, the experiment may suggest, provi- 
ded you consider it worthy to occupy a space in your valua- 
ble magazine, and remain, Yours, &c. 
Arthur Dunn. 
An evaporating dish, containing about twenty-eight pounds 
of moist carbonate of lead, was placed in a sand bath, and 
heated to about the same temperature as the drying stove com- 
monly used, never exceeding 150° Fahr. ; over this was fixed 
at the distance of from eight to twelve inches, a pair of com- 
mon bellows, with a glass tube attached to the pipe, which 
pipe was introduced into a green glass bottle containing 
