Chapter XII: PHYSICS.--A New Gas Thermo-Regulator.--A simple and

efficient apparatus for regulating heat in air baths,
etc.--1 illustration 9292

A New Thermometer.--The principle of the Bourdon safety
gauge applied to thermometry.--Fermis' new thermometer.--1
illustration 9291

Phosphorescence of Alumina.--By EDMOND BECQUEREL.--The
effects of impurities on phosphorescence discussed 9294

Separation of Nickel by the Magnet.--By THOMAS T. P.
BRUCE-WARREN.--The effect of copper on nickel in modifying
its susceptibility to magnetic attraction.--Practical
deductions as to nickel crucibles and gauze 9294

The Capillarity and Density of Liquids.--A simple experiment
in physics without apparatus.--1 illustration 9294