Steam Engine.--With several figures. 6714

Foot Lathes.--With engraving. 6715

Endless Trough Conveyer.--2 engravings. 6715

Railroad Grades of Trunk Lines. 6715

English Express Trains.--Average speed, long runs, etc. 6715

Apparatus for Separating Substances Contained in the
Waste Waters of Paper Mills, etc.--2 figures. 6717

II. TECHNOLOGY.--An English Adaptation of the American Oil
Mill.--Description of the apparatus, and of the old and
new processes.--Several engravings. 6716

Large Blue Prints.--By W.B. Parsons, Jr. 6717

III. ELECTRICITY, ETC.--Electrical Apparatus for Measuring
and for Demonstration at the Munich Exhibition.--With
descriptions and numerous illustrations of the different
machines. 6711

A New Oxide of Copper Battery.--By F. De Lalande and S.
Chaperon.--With description and three illustrations. 6714

IV. MATHEMATICS, ETC.--To Find the Time of Twilight.--1 figure. 6720

A New Rule for Division in Arithmetic. 6725