Chapter III: CHEMISTRY.--On Allotropic Forms of Silver.--By M. CAREY

LEA.--A continuation of this paper, containing one of the
most important researches in the history of silver, with
statement of interesting results attained. 11361

On the Occurrence of Paraffine in Crude Petroleum.--A
valuable contribution to the history of paraffine, with
reference to petroleum and ozokerite. 11361

Turpentine and its Products.--By EDWARD DAVIES.--A resume
of the work done by chemists in the turpentine products.
--The different compounds produced therefrom. 11361