delivered before the London Society of Arts, giving the line
of development of the different styles and the aspirations
of their originators. 34 illustrations. 10106

II. ASTRONOMY.--A Fivefold Comet.--A curious astronomical
deduction; the probable division of one comet into five by
the disturbing effects of the sun. 1 illustration. 10116

III. BIOGRAPHY.--Linnæus.--By C.S. HALLBERG.--The life and
work of the great botanist, his portrait and birthplace.
2 illustrations. 10114

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

V. ELECTRICITY.--Observations on Atmospheric Electricity.--By
Prof. L. WEBER.--Abstract of a British Association paper
on this important subject. 10114

The Menges Thermo-Magnetic Generator and Motor.--The direct
conversion of electricity into heat; the generator fully