on of sulphur with the last charges
falls to 0.03 per cent. The iron in the vessel remains sufficiently
fluid for several hours. When necessary, a little wood is thrown in.
It has been found quite unnecessary to obtain heat by passing and
burning a current of gas above the bath of metal.

A number of results, showing the separation of sulphur at the Hoerde
Works, was published a few months ago[2] by Professor P. Tunner, one
of our honorary members.

[Footnote 2: "Oesterreichische Zeitschrift fur Berg und
Huttenwesen," 1891, No. 19.]

The totals represent, respectively, 138,500 kilogrammes of pig iron
and 98,654 kilogrammes of sulphur.

Thus, from 138,500 kilogrammes of pig iron there has been eliminated
179,577-98,654 = 80,923 kilogrammes of sulphur, or, in other words,
45.063 per cent.

The proportion of sulphur in the slags rises with that in the iron
from the blast furnace to 17 per cent., an inappreciable portion of
the sulphur of the slag being oxidized to sulphurous anhydride by
access of air. An analysis of the slag yielded the following results:

Per cent.
Sulphur 17.07
Manganese 30.31
Phosphoric anhydride 0.61
Iron 7.13
Bases 35.04

An analysis of an average sample gave:

Per cent.
Manganese sulphide 28.01
Manganous oxide 20.23
Ferrous oxide 25.46
Silica 18.90
Alumina 5.00
Lime 3.53
Magnesia 0.43

The great convenience and certainty presented by the method described
in this paper will in all probability lead to its general adoption. As
a matter of fact, several works are now occupied with the installation
of this mixing and desulphurizing plant.

* * * * *

ON THE OCCURRENCE OF TIN IN CANNED FOOD.

By H.A. WEBER, Ph.D.

The following investigation of the condition of foods packed in tin
cans was prompted by an alleged case of poisoning, which occurred at
Mansfield, Ohio, in April, 1890. A man and woman were reported to the
writer as having been made sick by eating pumpkin pie made from canned
pumpkin. The attending physician pronounced the case one of lead
poisoning. The wholesale dealer from whose stock the canned p