Chapter I: ENGINEERING, ETC.--Steel Structures.--Best use of different

grades of steel.--From a paper by Mr. JAS. CHRISTIE.

Natural Gas Fuel and its Application to Manufacturing:
Purposes.--Paper read before the Iron and Steel Institute by
Mr. ANDREW CARNEGIE.--First use of the gas.--Wells near
Pittsburg.--Extent of territory underlain with gas.--Cost of
piping.--Analyses ofnatural gas.

A Gas Engine Water Supply Alarm.--1 figure.

The Water Supply of Ancient Roman Cities.--An address by
Prof. W.H. CORFIELD.--Aqueducts for the supply of
Borne.--The aqueduct bridge Pont du Gard.--The supply of
Lyons.--Construction of underground aqueducts.

Steam Engine Economy.--By Chief Engineer J. LOWE,
U.S.N.--With diagram.

The "Elastic Limit" in Metals.--Selection of wire for
suspension bridges, etc.

Prices of Metals in 1874 and 1884.--With table.