Chapter III: TECHNOLOGY.--The Blue Print Process.--R.W. JONES

Reproductions of Drawings in Blue Lines on White Ground.--By
A.H. HAIG.

A Plan for a Carbonizing House.--With full description and 5
figures.

The Scholar's Compasses.

The Integraph.--With full description and engraving.

Apparatus for the Manufacture of Gaseous Beverages. 2 engravings.

Sandmann's Vinegar Apparatus. 1 figure.

Field Kitchens. 8 figures.

A New Cop Winding Machine. 3 figures.

The Preservation of Timber.--Report of the Committee of the
American Society of Engineers.--The Boucherie
process.--Experiments.--Decay of timber.