ages to compress in a book of some 150 pages all
that one can possibly wish to know about the different parts of the
machinery, whether of English or foreign make, and for whatever
kind of cloth required. A comprehensive summary is also included of
the various yarns and methods of numbering them, as well as a few
useful hints and a number of coloured diagrams for mandarin
weavings. The book is printed in bold, legible type, on good paper,
has a copious index, and is well and strongly
bound."--_Ashton-under-Lyne Herald._

"In dealing with the complicated parts of various classes of
power-looms, the writer, who is one of the professors at the Royal
Weaving School of Asch, brings to the work a thorough knowledge of
the subject, and, what is of great value, he has the gift of
communicating his knowledge in a way which is easily understood.
The smallest details of loom-setting are entered into, and a full
explanation of problems, which are a source of anxiety to many
engaged in overlooking, is given. Students will find the work an
admirable text-book, and all who are interested in weaving will see
in it a valuable addition to the literature on this subject.... The
book is in small compass, and is crowded with valuable
information."--_Bradford Observer._

* * * * *

=COLOUR: A HANDBOOK OF THE THEORY OF COLOUR.= By GEORGE H. HURST, F.C.S.
=With Ten Coloured Plates= and Seventy-two Illustrations. 160 pp. Demy
8vo. 1900. Price 7s. 6d.; India and Colonies, 8s.; Other Countries, 8s.
6d.; strictly net.

=Contents.=

Chapters I., =Colour and Its Production.= Light, Colour, Dispersion of
White Light Methods of Producing the Spectrum, Glass Prism and
Diffraction Grating Spectroscopes, The Spectrum, Wave Motion of Light,
Recomposition of White Light, Hue, Luminosity, Purity of Colours, The
Polariscope, Phosphorescence, Fluorescence, Interference.--II., =Cause
of Colour in Coloured Bodies.= Transmitted Colours, Absorption Spectra
of Colouring Matters.--III., =Colour Phenomena and Theories.= Mixing
Colours, White Light from Coloured Lights, Effect of Coloured Light on
Colours, Complementary Colours, Young-Helmholtz Theory, Brewster Theory,
Supplementary Colours, Maxwell's Theory, Colour Photography.--IV., =The
Physiology of Light.= Structure of the Eye, Persistence of Vision,
Subjective Colour Phenomena