Increasing the Illuminating Power of Gases, etc.--By V. POPP.--
3 figures.
Preventing Iron from Rusting.
An Elastic Mass for Confectioners' Use.
Caoutchouc.
Photographic Action Studied Spectroscopically.
Salt and Lime.
Renewing Paint without Burning.
A Green or Golden Color for all Kinds of Brass.--By E. PULCHER.
Vinegar.
The Preservation of Meat by Carbonic Acid.
On the Adulteration of Soap.--By Dr. H. BRACKEBUSCH.