Improved Averaging Machine.

Compound Beam Engine. 4 figures.--Borsig's improved
compound beam engine.

Power Hammers with Movable Fulcrum.--By DANIEL
LONGWORTH. 5 figures.

The Bicheroux System of Furnaces Applied to the Puddling of
Iron. 2 figures.

Gessner's Continuous Cloth Pressing Machine. 3 figures.

Novelties in Ring Spindles. 4 figures.

Improvements in Woolen Carding Engines.

II. NATURAL HISTORY.--Metamorphosis of the Deer's
Antlers.--Annual changes. 9 figures.

Monkeys. By A.R. WALLACE.--Comparison of skeletons of man,
orang outang, and chimpanzee.--Other anatomical resemblances
and diversities.--The different kinds of monkeys and the
countries they inhabit.--American monkeys.--Lemurs.
--Distribution, affinities, and zoological rank of monkeys.

Silk Producing Bombyces and other Lepidoptera reared in
1881. By ALFRED WAILLY, Member Lauriat de la Societe
d'Acclimatation de France.--An extended and important
European, Asiatic, and American silk worms, and other