of hay fever.

VI. MATHEMATICS.--Radii of Curvature Geometrically Determined.--By
Prof. C.W. MACCORD, Sc.D.--No. VII. Path of a
point on a connecting rod. 3 illustrations.

VII. MICROSCOPY.--Improved Microscopical Settling Tube.--By F.
VANDERPOEL.--New tubes for use in urinary analysis. 4
illustrations.

VIII. MISCELLANEOUS.--Apparatus for Manufacturing Bouquets.--An
ingenious machine for facilitating the construction of
bouquets. 1 illustration.

Bozerian's Refrigerant Punkas.--A fan worked by the feet, a
substitute for the Indian punka. 2 illustrations.

How to Make a Kite without a Tail.--An improved form of kite
described and illustrated. 1 illustration.

Punkas.--By J. WALLACE, C.E.--The mechanics of punkas;
experiments on their rate of swing.

The Edible Earth of Java.--An account of this curious substance,
its taste and appearance.

IX. NAVAL ENGINEERING.--Another Remarkable Torpedo Boat.--Over
twenty-eight miles an hour.--Full particulars of the trial of
one of the new Italian torpedo boats, built by Yarrow & Co.

Copeman & Pinhey's Life Rafts.--A new life raft for use on
steamers, folding into deck settees. 3 illustrations.

X. PHYSICS.--Sunlight Colors--By Capt. W. DE W. ABNEY.--A valuable
lecture on the cause of the colors of the sun, and their relative
intensities. 3 illustrations.

The Wave Theory of Sound Considered.--By HENRY A. MOTT,
Ph.D., LL.D.--Arguments against the generally accepted theory
of sound.

* * * * *

COPEMAN & PINHEY'S LIFE RAFTS.

The experiments with life saving appliances which Mr. Copeman brought
before the delegates of the Colonial Conference, on the 13th April, at
the Westminster Aquarium, had a particular interest, due to the late and
lamentable accident which befell the Newhaven-Dieppe passenger steamer
Victoria. In many cases of this nature, loss of life must rather be
attributed to panic than to a want of life saving appliances; but, as a
general rule, an abundant supply of such apparatus will tend to give
passengers confidence, and prevent the outbreak of such discreditable
scenes on the part of passengers as took place on the Victoria.

[Illustration: FIG. 1.--COPEMAN & PINHEY'S LIFE RAFTS.]

Messrs. Copeman & Pinhey have, for some years past, done good work in
th