27 



from which Extra Steam is Taken — The Weight of Water which must be Evaporated from 

 100 Kilos, of Liquor in order its Original Percentage of Dry Materials from 1-25 per cent, 

 up to 20-70 per cent. — The Relative Proportion of the Heating Surfaces in the Elements 

 of the Multiple Evaporator and their Actual Dimensions — The Pressure Exerted by Currents 

 of Steam and Gas upon Floating Drops of Water — The Motion of Floating Drops of Water 

 upon which Press Currents of Steam — The Splashing of Evaporating Liquids — The Diameter 

 of Pipes for Steam, Alcohol, Vapour and Air — The Diameter of Water Pipes — The Loss 

 of Heat from Apparatus and Pipes to the Surrounding Air, and Means for Preventing 

 the Loss — Condensers — Heating Liquids by Means of Steam — The Cooling of Liquids — 

 The Volumes to be Exhausted from Condensers by the Air-pumps — A Few Remarks on Air- 

 pumps and the Vacua they Produce — The Volumetric Efficiency of Air-pumps — The Volumes 

 of Air which must be Exhausted from a Vessel in order to Reduce its Original Pressure to a 

 Certain Lower Pressure — Index. 



Sanitary Plumbing, Electric 

 Wiring, Metal Work, etc. 



EXTERNAL PLUMBING WORK. A Treatise on Lead 

 Work for Roofs. By John W. Hart, R.P.C. 180 Illustrations. 272 

 pp. Demy 8vo. Second Edition Revised. Price 7s. 6d. net. (Post 

 free, 7s. lOd. home : 8s. abroad.) 



HINTS TO PLUMBERS ON JOINT WIPING, PIPE 

 BENDING AND LEAD BURNING. Third Edition, 

 Revised and Corrected. By John W. Hart, R.P.C. 184 Illustrations. 

 313 pp. Demy 8vo. Price 7s. 6d. net. (Post free, 8s. home ; 8s. 6d. 

 abroad.) 



Contents. 



Pipe Bending — Pipe Bending (continued) — Pipe Bendinj (continued) — Square Pipe 

 Bendings — Half-circular Elbows — Curved Bends on Square Pipe — Bossed Bends — Curved 

 Plinth Bends — Rain-water Shoes on Square Pipe — Curved and Angle Bends — Square Pipe 

 Fixings — Joint-wiping — Substitutes for Wiped Joints — Preparing Wiped Joints — Joint Fixings 

 — Plumbing Irons — Joint Fixings — Use of "Touch" in Soldering — Underhand Joints — Blown 

 and Copper Bit Joints — Branch Joints— Branch Joints (continued) — Block Joints — Block 

 Joints (continued) — Block Fixings — Astragal Joints — Pipe Fixings— Large Branch Joints — 

 Large Underhand Joints — Solders — Autogenous Soldering or Lead Burning — Index. 



SANITARY PLUMBING AND DRAINAGE. By John 

 W. Hart. Demy 8vo. With 208 Illustrations. 250 pp. 1904. Price 

 7s. 6d. net. (Post free, 7s. lOd. home ; 8s. abroad.) 



ELECTRIC WIRING AND FITTING FOR PLUMBERS 

 AND GASFITTERS. By Sydney F.Walker, R.N., M.I.E.E., 

 M.I.Min.E., A.M.Inst.C.E., etc., etc. Crown 8vo. 150 pp. With Illus- 

 trations and Tables. Price 5s. net. (Post free, 5s. 3d. home ; 5s. 6d. 

 abroad.) 



THE PRINCIPLES AND PRACTICE OF DIPPING, 

 BURNISHING, LACQUERING AND BRONZING 

 BRASS WARE. By W. Norman Brown. Revised and 

 Enlarged Edition. 48 pp. Crown 8vo. Price 3s. net. (Post free, 

 3s. 3d. home and abroad.) {^ust published. 



THE HISTORY OF INCANDESCENT LAMPS. By G. 



Basil Barham, A.M. I.E. E. Illustrated. Demy 8vo. [In the press. 



WIRING CALCULATIONS FOR ELECTRIC LIGHT 

 AND POWER INSTALLATIONS. A Practical Hand- 

 book containing Wiring Tables, Rules, and Formulae for the Use of 

 Architects, Engineers, Mining Engineers, and Electricians, Wiring 

 Contractors and Wiremen, etc. By G. Lummis Paterson. Crown 8vo. 

 Twenty-two Illustrations. About 120 pp. [In the press. 



Contents. 



Systems of Electrical Distribution— Direct Current Wiring Calculations — Data Relating to 

 Direct Current Motors — Data Relating to Direct Current Dynamos— Alternating Current 

 Wiring Calculations — Alternating Current Motor Wiring Calculations — Calculation of Alter- 

 nating Current Exposed Wiring Circuits — Data Relating to Alternating Current Motors — 

 Insulation Resistance — Minimum Insulation Resistance of Electric Light Installation — 1 Lamp 

 to 150 Lamps — Particulars of Electrical Conductors — Approximate Wiring Capacity of Metal 

 Conduits— Carrying Capacity of Conductors in 16 Candle Power Lamps at Various Voltages 

 and Sfficiencies — Current Density in Conductors 1000 Amperes per square inch. 



