NEW YORK, APRIL 25, 1891
Reading edition
Scientific American Supplement. Vol. XXXI, No. 799.
Scientific American established 1845
Scientific American Supplement, $5 a year.
Scientific American and Supplement, $7 a year.
TABLE OF CONTENTS.
I. ARCHITECTURE.—Marble and Mosaic.—By T.R. SPENCE.—A paper recently read before the Architectural Association, London, containing valuable suggestions for designers of buildings.
The St. Lawrence Hospital for the Insane.—A New York State hospital recently built from designs by the State architect.—Full description.—1 illustration.
II. BOTANY.—Lavender and its Varieties.—The history, properties, and technology of this plant.—2 illustrations.
III. CHEMISTRY.—A Projecting Apparatus of Precision.—A useful adjunct for the chemist's balance, accelerating the operation of weighing.—1 illustration.
Spectrum of the Sun and Elements.
Allotropic Forms of Metals.
IV. HYDRAULICS.—The Power of Water, or Hydraulics Simplified. —By G.D. HISCOX.—Current wheels for power and raising water. Interesting presentation of this practical portion of the subject. —4 illustrations.
V. MECHANICAL ENGINEERING.—Compressed Air Production.— By WM. L. SAUNDERS.—A Sibley College lecture, giving full elaboration to this important subject.—The various forms of compressors and general features of the service.—18 illustrations.
Improved Pneumatic Hammer.—A suspension hammer capable of delivering 500 blows per minute.—8 illustrations.
The Thermic Motor of the Future?—A remarkable exposition of the possibilities of the gas engine.—Recent experiments under M. Aime Witz.—2 illustrations.
VI. MEDICINE AND HYGIENE.—The Electrical Purification of Sewage and Contaminated Water.—By WM. WEBSTER.
VII. NAVAL ENGINEERING.—The New German Dispatch Boat Meteor.—A German built war vessel of great speed.—Her dimensions and rating.—1 illustration.
The Raising of the Ulunda.—A remarkable feat.—The raising of a steamship sunk off Nova Scotia.—10 illustrations.
VIII. TECHNOLOGY.—Starches for the Finishing of Cotton Fabrics. —Classification of starches, with illustrations of their appearance under the microscope.