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.