Chapter IV: CHEMISTRY.--An Apparatus for Preparing Sulphurous, Carbonic,

and Phosphoric Anhydrides.--By H.N. WARREN.--A simple
apparatus for this purpose described and illustrated.
1 illustration. 10117

The Arrangement of Atoms in Space in Organic Molecules.--A
review of Prof. JOHANNES WISLICENUS' recent theories
on this abstract subject. 10117

The Isolation of Fluorine.--Note on this last isolation of
an element, with the properties of the gas. 1 illustration. 10117