VI. MEDICINE AND HYGIENE.--The Philosophy of Consumption.
--By Dr. J.S. CHRISTISON.--A review of the present theories of
consumption, and the role played in it by its bacillus.

VII. MUSIC.--Spacing the Frets on a Banjo Neck.--By Prof. C.W.
MACCORD.--A most practical treatment of this subject, with full
explanations.--1 illustration.

VIII. ORDNANCE.--High Explosives in Warfare.--By Commander
F.M. BARBER, U.S.N.--An elaborate review of modern explosives
in their applicability to ordnance, etc.

The Experiments at the Annapolis Proving Grounds.--The recent
tests at Annapolis described and illustrated.--Views of the
projectiles, plates, etc.--3 illustrations.

IX. PHYSICS.--Aræo-Picnometer.--An entirely novel form of hydrometer,
of very extended use and application.--1 illustration.

X. TECHNOLOGY.--Fabric for Upholstery Purposes.--Full technical
description of the method of producing a new and characteristic
fabric.--1 illustration.

Gaseous Illuminants.--By Prof. VIVIAN B. LEWES.--Continuation
of this important article, treating of the water gas and special
processes, with analyses.

Glove Making.--Early history of glove making in America.--Its
present aspects and processes.