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.