NEW YORK, MAY 19, 1883

Scientific American Supplement. Vol. XV., No. 385.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

TABLE OF CONTENTS.

I. NATURAL HISTORY.--Fishes of Cuban Waters.

Panax Victoriæ.--1 Illustration.

A Note on Sap. By Prof. ATTFIELD.

The Crow.--Illustration.

The Praying Mantis and its Allies.--Illustration.

May Flies.--2 illustrations.

II. TECHNOLOGY.--A Quick Way to Ascertain the Focus of a Lens.--1 diagram.

The History of the Pianoforte. By A.J. HIPKINS.--Different parts of a pianoforte and their uses.--Inventor of the instrument and his "action."--First German piano-maker.--Square pianos.--Pianos of Broadwood, Backers, Stodart, and Erard.--Introduction of metal tubes, plates, bars, and frames.--Improvements of Meyer, the Steinways, Chickerings, and others.--Upright pianos.--Several figures.

III. MEDICINE AND HYGIENE.--The Poisonous Properties of Nitrate of Silver and a Recent Case of Poisoning with the Same. By H. A. MOTT, Jr.

Tubercle Bacilli in Sputa.

Malaria. By Dr. JAMES H. SALISBURY.--VIII. Local observations.--Effect of the sun on ague plants.--Investigations into the cause of ague.--Notes on marsh miasm.--Analysis of malari a plant.--Numerous figures.

IV. ENGINEERING.--Torpedo Boats.--Full page illustration.

Pictet's High Speed Boat.--Several figures and diagrams.

Initial Stability Indicator for Ships.--4 figures.

V. ELECTRICITY, LIGHT, AND HEAT.--Scrivanow's Chloride of Silver Pile.--2 figures.

On the Luminosity of Flame.

VI. CHEMISTRY.--New Bleaching Process, with Regeneration of the Baths Used. By M. BONNEVILLE.

Detection of Magenta, Archil, and Cudbear in Wine.

VII. ARCHITECTURE.--The Pantheon at Rome.

VIII. MISCELLANEOUS.--The Raphael Celebration at Rome.--3 Illustrations.

Great International Fisheries Exhibition.--1 figure.

Puppet Shows among the Greeks.--3 illustrations.