Chapter I: ENGINEERING AND MECHANICS.--Portable Steam Pumping Engine, 1

engraving.--New Bone Crushing Mill, 2 engravings.--Picard's Boiler.
Extraction of Salt from Salt Water.--Compressed Air Machines.
Hydraulic vs. air pressure. Causes of the losses of power.
Estimates of useful effects obtainable.--The St. Gothard Tunnel.
By GEO. J. SPECHT, C.E.--Apparatus for Lifting Sunken Vessels,
with 8 figures.--Russia Sheet Iron.--Manufacture of Artificial
Stone.--Compressed Fuel.--The New Magnesi Process for Boiler Feed
Water.