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.