A Practical Manual On Sea Water Distillation
With A Description Of The Necessary Machinery For The Process

___________ ________________ _______________________________ __________________ CONTENTS. (e) Town Gas. Gaseous Fuel: Petrol, Acetylene______________________ Convenience of Town Gas,_________________________ Its Price,_____________________________________ Specific Gravity—B.T.U. Obtainable, • Composition of Town Gas—Explosive Mixture with Air, Pressure of Town Gas—Table J—Measuring Gas by Meter, Heating Power and Cost compared with Coal, Economy of Gas lost for Ordinary Boiler Use, (/") Recapitulation of Fuel Heat, xi Sections. 11, 12 13 14 15 16 17-20 21, 22 23 24-26 CHAPTER VI . THE EVAPORATOR. (A) General Outline. “Evaporator” Defined,_______________________ Sea Water Operated on only partly Evaporated, . Steam Heat in Coil—Various Forms of Evaporators, Heat /»side and OuZside Coil, • ••••• Exhaust Steam, Use of—Battleships, Cruisers, Destroyers, Ocean Liners, Yachts—What Steam Supplied to Evaporators, Unsteady Pressure of Exhaust Steam, • Economy of Exhaust Steam,_______________________ Economy Generally Explained,___________________ Economy and Time Production Distinguished, Economy of Low Pressures Explained and Defined, Steady Ebullition Necessary—Baffles, . Secondary Steam—Vapour Valve, when required, Safety Valve,______________________________ Sections. 1 2 3 4 1.5 6 7 8 9-13 14 15-19 20 21 22 (B) Gas-heated Steam Generators. Small Apparatus for Domestic Use, &c., . . • 24