"--_Educational News._

"It is difficult to make descriptions of machinery and mechanism
interesting, but Mr. Williams has the enviable knack of doing so, and it
is hardly possible to open this book at any page without turning up
something which you feel you must read; and then you cannot stop till
you come to the end of the chapter."--_Electricity._

"This book is full of interest and instruction, and is a welcome
addition to Messrs. Seeley and Company's Romance Series."--_Leeds
Mercury._

"A book of absorbing interest for the boy with a mechanical turn, and
indeed for the general reader."--_Educational Times._

"An instructive and well-written volume."--_Hobbies._

SEELEY & CO., LTD., 38 GREAT RUSSELL STREET.

WORKS BY C.J. CORNISH

THE NATURALIST ON THE THAMES. With Thirty-eight Illustrations. Demy
8vo. 7s. 6d.

"Will give great delight to any lover of natural history.... It is a
most fascinating volume, and is illustrated in a manner worthy of the
text."--_Scotsman._

"From the first page to the last there is not a single page which the
reader would not wrong himself by skipping."--_Standard._

ANIMALS OF TO-DAY: Their Life and Conversation. With Illustrations
from Photographs by C. REID, of Wishaw. Crown 8vo. 6s.

"Quite one of the brightest books of popular natural history which have
appeared in recent years is Mr. Cornish's fascinating studies of
'Animals of To-Day.'"--_Leeds Mercury._

NIGHTS WITH AN OLD GUNNER, and other Studies of Wild Life. With
Sixteen Illustrations. 6s.

"Cannot fail to be interesting to any lover of wild nature. The
illustrations are numerous and excellent."--_Pall Mall Gazette._

ANIMALS AT WORK AND PLAY: Their Emotions and Activities.
Illustrated from Photographs by GAMBIER BOLTON, F.Z.S., and others,
and from Drawings. Third Edition. 6s.

"Such a book as Mr. Cornish's shows how much there is to repay the
intelligent observer of Nature."--_Times._

"Good as the former books were, we are disposed to think that this is
even better still."--_Spectator._

WILD ENGLAND OF TO-DAY, and the Wild Life in It. Illustrated with
Original Drawings by LANCELOT SPEED, and from Photographs. Third
Edition. 6s.

"Those of us who are left in town in the dull days will seem, in reading
these pages, to sniff the fresh sea-breezes, to hear the cries of the
sea-bird and the songs of the wood-bird, to be conscious of t