gular mass, and on it, partly imbedded, was a
wrought-iron nut not melted. The steam-pipe spoken of fell a distance of
20 feet, and some of the magnesia covering was broken by the fall, but
so effective was its heat-resisting and non-heat-conducting power that
the pipe was found to be uninjured, and it is being used again in the
building which is being erected to take the place of the one burned.
That the magnesia should have endured the ordeal successfully was not
unexpected, for we know that it is used by the Herreshoff Manufacturing
Company as a lining to the shells of its coil boilers, and it is there
subjected to a very intense heat resulting from the forced draught used
in this type of boiler. Instances could be multiplied indefinitely, but
I refrain from occupying further time with them, citing, however, one
recent pertinent case.

The trial trip of the new cruiser "_Baltimore_" took place in the middle
of September. It is reported to have been in many ways eminently
satisfactory. The report goes on to state: "Another noteworthy fact was
the comfortable condition of the fire and engine rooms. A duplicate crew
had been provided with the expectation of relieving the firemen in
two-hour turns; but after the first two hours of the run the first watch
refused to quit work and insisted in running the ship throughout the
entire four hours' trial." Boilers and all steam-surfaces were covered
with the magnesia covering.

So it appears that not alone is the man who pays for the coal interested
in this question of most perfect insulation, but also the men who
operate the plant as well. In time, those architects, those mechanical
engineers, those engine-builders and those other advisers, who are paid
to advise soundly and correctly, and who are represented by our figure
with the re-entering angles, will, of necessity, change their form and
begin to assimilate these new facts, or ossification will so spread
throughout the whole figure that they will be relegated to the shelf for
curiosities as showing what strange geometrical forms the intellectual
life of man may take.

* * * * *

THE COST OF A SMALL MUSEUM.

[Illustration: Mr. A.A. Carey's
Cambridge, Mass.
_Sturgis & Brigham Archts._]

More than once we have endeavored to impress upon our readers the
importance of collections of casts and other art reproductions as
factors in popular education. It is only through these that the