Chapter IV: CHEMISTRY.--American Association--Ninth Annual Report of

the Committee on Indexing Chemical Literature.--A very important
report upon the titular subject, with probabilities of future advance
in this line.--The chemical index of the SCIENTIFIC
AMERICAN and SUPPLEMENT

Apparatus for the Estimation of Fat in Milk.--By E. MOLINARI.--
Details of a method of determining fat in milk, with illustration
of the apparatus employed

Further Researches upon the Element Fluorine.--By A.E. TUTTON.--
Additional researches upon this element, following up
the work outlined by M. MOISSAN.--3 illustrations

The Allotropic Conditions of Silver.--A recent letter from M.
CAREY LEA on this subject, with note of its presentation before
the French Academy by M. BERTHELOT

The French Wine Law.--Recent enactment as to the adulterations
of wine