RENCY OF PAPERS--THE "LIFE" OF MACHINE WIRES--EDGE
RUNNERS.

Volume IV. contains discussions upon Water Supplies and the
Management of the Paper Machine and its influence upon the
Qualities of Papers. Crown 8vo, 164 pp. _Net_ =5/0=

CONTENTS:--THE BULKING OF PAPERS--SPECIAL QUALITIES OF "ART"
PAPERS--THE "AGEING" AND STORAGE OF PAPERS--THE USE OF LIME IN
BOILING--CONTROLLING THE MARK OF THE "DANDY"--"MACHINE" AND "HAND" CUT
RAGS--FROTH ON PAPER MACHINE--SCUM SPOTS IN PAPER--CONSUMPTION OF WATER
IN THE MANUFACTURE OF PAPER--THE MANAGEMENT OF SUCTION-BOXES--THE
SHRINKAGE OF PAPER ON THE MACHINE--PAPER THAT DOES NOT SHRINK OR
EXPAND--THE PRODUCTION OF NON-STRETCHABLE PAPER--THE CONNECTION
BETWEEN "STRETCH" AND "EXPANSION" OF PAPERS--"STRETCH" AND "BREAKING
STRAIN"--PAPER TESTING MACHINES.

Volume V. concerning THE THEORY AND PRACTICE OF BEATING. Crown 8vo.
With photomicrographs and other Illustrations. _Net_ =5/0=

CONTENTS:--EARLY BEATING APPLIANCES--THE HOLLANDER--THE ECONOMY OF
BEATING--DIFFICULTIES OF ARRIVING AT DEFINITE RESULTS--BEHAVIOUR OF
DIFFERENT FIBRES--"REFINING"--POWER CONSUMPTION--A COMPARISON OF TWO
DIFFERENT KINDS OF BEATERS--POWER CONSUMED IN THE "BREAKING," "BEATING,"
AND "REFINING" OF DIFFERENT MATERIALS--DEALING WITH THE "CIRCULATION"
AND "AGITATION" IN A HOLLANDER--COMPARISONS OF LARGE AND MEDIUM-SIZED
HOLLANDERS WHEN BEATING "HARD" AND "SOFT" STOCK--TRIALS TO DETERMINE THE
RELATIVE MERITS OF STONE AND METAL BEATER-BARS--TRIALS WITH BREAKERS,
REED BEATERS, AND KINGSLAND REFINERS--A SYSTEM OF BEATING COMBINED WITH
A SYSTEM FOR CONTINUOUS BLEACHING--BEATERS AND REFINERS--POWER CONSUMED
IN GRINDING WOOD-PULP--THE REDUCTION IN LENGTH OF FIBRES AT DIFFERENT
STAGES OF BEATING--METHOD FOR DETERMINING THE "WETNESS" OF BEATEN
STUFF--THE POSITION OF BEATERS IN OLD AND MODERN PAPER-MILLS--APPENDIX.

=PARA RUBBER. ITS CULTIVATION & PREPARATION.= By W. H. JOHNSON, F.L.S.,
Ex-Director of Agriculture, Gold Coast Colony, West Africa, Director of
Agriculture, Mozambique Company, East Africa, Commissioned by Government
in 1902 to visit Ceylon to Study the Methods employed there in the
Cultivation and Preparation of Para Rubber and other Agricultural
Staples for Market, with a view to Introduce them into West Africa.
Second Edition, rewritten and greatly enlarged, with numerous
illustrations. Demy 8vo, cloth _Net_ =7/6=

THE WORLD'S PRODUCTION AND CONSUMPTION OF RUBBER--THE PARA RUBBER
TR