CHAPTER I.

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A TEXT-BOOK OF PAPER-MAKING;

BY C. F. CROSS AND E. J. BEVAN (1888)

[Illustration:

COTTON. × 50.

LINEN. × 50.

ESPARTO. × 50.

MECHANICAL WOOD-PULP. × 50.

CHEMICAL WOOD-PULP. × 50.]

A

TEXT-BOOK OF

PAPER-MAKING.

BY

C. F. CROSS AND E. J. BEVAN.

[Illustration]

E. & F. N. SPON, 125, STRAND, LONDON.

NEW YORK: 35, MURRAY STREET.

1888.

PREFACE.

The practical portion of the present work has in part already appeared

as an article, by one of the authors, in ‘Spons’ Encyclopædia of the

Industrial Arts.’ Since its publication, however, many and important

improvements have been introduced in this, as in other branches of

the art of paper-making, which necessitated considerable additions to

the original article. It has at the same time been to a great extent

re-written, and, as the authors hope, improved.

Our object in writing this book has been to bring before students and

others the principles upon which scientific paper-making should be

conducted, a concise exposition of which has not, we believe, been

hitherto attempted.

Considerable prominence has been given to this aspect of the subject,

possibly at the expense of what some may consider more essential

details.

A belief in the importance of a thorough scientific training for

paper-makers has dictated the style and purpose of the book.

We have not thought it necessary to enter into minute details

respecting the construction of machinery, &c.; for these the reader

is referred to such works as Hofmann’s Treatise on the Manufacture of

Paper.

Much of the scientific portion is here published for the first time.

Part of it has already appeared in the form of papers read before

various societies.

The chapter relating to the Treatment of Wood formed the subject of an

essay, which obtained the prize offered by the Scottish Paper-makers’

Association, in connection with the Edinburgh Forestry Exhibition, 1884.

We would here express our obligations to Messrs. G. and W. Bertram,

Messrs. Masson, Scott, and Bertram, Messrs. Rœckner and Co., and

others, for their courtesy in furnishing us with the drawings from

which the illustrations were prepared; to Dr. C. R. A. Wright, F.R.S.,

who kindly communicated the substance of the chapter on the Action of

Cuprammonium on Cellulose; to Mr. Carl Christensen, for drawings and

information regarding the manufacture of mechanical wood-pulp; also

to the following friends, among others, who have, in various ways,

rendered us important assistance:—Messrs. R. C. Menzies, C. M. King, G.

E. Davis, A. Beckwith, and C. Beadle.

Finally, we would tender our thanks to Mr. C. G. Warnford Lock for the

care he has bestowed on the editing of the book. The indexing and the

Chapter on Statistics are entirely his production.

C. F. CROSS and E. J. BEVAN.

4, NEW COURT, LINCOLN’S-INN, W.C.

CONTENTS.

INTRODUCTORY NOTE . . . 1

CHAPTER I.

CELLULOSE—THE CHEMICAL PROPERTIES OF TYPICAL MEMBERS OF

THE CELLULOSE GROUP, WITH REFERENCE TO THEIR NATURAL

HISTORY . . . 4

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