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