ectricity.--By
Prof. L. WEBER.--Abstract of a British Association paper
on this important subject. 10114

The Menges Thermo-Magnetic Generator and Motor.--The direct
conversion of electricity into heat; the generator fully
described. 5 illustrations. 10113

VI. ENGINEERING.--An Investigation into the Internal Stresses
Occurring in Cast Iron and Steel.--By General NICHOLAS
KALAKOUTZKY.--First installment of an elaborate paper,
giving theoretical and experimental examination of this
subject. 2 illustrations. 10105

Hargreaves' Thermo-Motor.--A new caloric engine.--Its
construction, theory, and cylinder diagrams.
6 illustrations. 10104

The Compound Steam Turbine.--A description and discussion
of this motor, in which a series of forty-five turbines are
acted on by the current of steam. 2 illustrations. 10103

VII. MISCELLANEOUS.--Cold Storage for Potatoes.--The application
of artificial cold to preserving potatoes.--Results obtained
in actual experience.--A practical paper by Mr. EDWIN
TAYLOR. 10115

VIII. PHYSICS.--On a Method of Making the Wave Length of Sodium
Light the Actual and Practical Standard of Length.--By ALBERT
A. MICHELSON and EDWARD W. MORLEY.--Description of the
new standard of length and outlines of the practical method for
its determination.--The question of check determinations.
1 illustration. 10115

IX. TECHNOLOGY.--Progress of the Sorghum Sugar Industry.--
Elaborate report on the diffusion process as developed at
the Fort Worth, Kan., station. 2 illustrations. 10110

The Lowe Incandescent Gas Burner.--The well known advanced
type of gas burner described and illustrated. 1
illustration. 10110

* * * * *

THE COMPOUND STEAM TURBINE.

Last year the whole of the lighting of the Newcastle Exhibition was
effected by the agency of seventeen of these motors, of which four were
spare, giving in the aggregate 280 electrical horse power. As the steam
was provided by the authorities of