(p. c27)

_Re_Coefficient of Transmission of Heat, k/, and the Mean Temperature
Difference, [Greek: theta]/m -- Parallel and Opposite Currents --
Apparatus for Heating with Direct Fire -- The Injection of Saturated
Steam -- Superheated Steam -- Evaporation by Means of Hot Liquids --
The Transference of Heat in General, and Transference by means of
Saturated Steam in Particular -- The Transference of Heat from
Saturated Steam in Pipes (Coils) and Double Bottoms -- Evaporation in
a Vacuum -- The Multiple-effect Evaporator -- Multiple-effect
Evaporators 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, METAL WORK, ETC., 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. 10d. home; 8s. abroad.)

#Contents.#

Cast Sheet Lead -- Milled Sheet Lead -- Roof Cesspools -- Socket Pipes
-- Drips -- Gutters -- Gutters (continued) -- Breaks -- Circular
Breaks -- Flats -- Flats (continued) -- Rolls on Flats -- Roll Ends --
Roll Intersections -- Seam Rolls -- Seam Rolls (continued) -- Tack
Fixings -- Step Flashings -- Step Flashings (continued) -- Secret
Gutters -- Soakers -- Hip and Valley Soakers -- Dormer Windows --
Dormer Windows (continued) -- Dormer Tops -- Internal Dormers --
Skylights -- Hips and Ridging -- Hips and Ridgi