Technics, a Magazine to Aid Technical Progress, at the close of its first half-year presents, in its bound form, such a fund of valuable information as no up-to-date student of science can afford to ignore. It is indeed amazing to note what wealth of expert knowledge is condensed within the limits of this single volume. Sir William Ramsay writes on "The Periodic Arrangement of the Elements"; Lord Rayleigh revises for the magazine his lecture on " Shadows " - shadows thrown by light and shadow's thrown by sound; Sir William Abney takes a retrospective glance at technical education, and the same subject is discussed in its various aspects by Sir William White, Professor Wertheimer, and other authorities. "Charlottenburg," the great Berlin technical high school, is described by Professor W. E. Dalby, and John Hulme throws "Side Lights on Technical Education in America." Radium is the subject of a valuable series of articles by Edwin Edser, and Polonium, X Rays, and X Rays are ably discussed. The wide scope of Technics may be conceived when we say-that the subjects treated range from electric lighting to rag boiling; technical instruction for chauffeurs to the bacteriology of brewing; theory of structural design and the ventilation and heating of a building to boot and shoe manufacture and mural decoration. Articles on photography are numerous and valuable. In a capital series of illustrated papers " On the Diagrammatic Illustration of Class Lectures," which we commend to the notice of all kinds of teachers, we find the most complete directions for making lantern slides that we have seen in print anywhere. Throughout the volume the illustrations are numerous and admirable, including portraits of most of the great scientists of the day. (George Newnes,

Limited, price 7s. 6d. net.

An Introduction to Metal Working (" Home and School

Library") is in all respects such an ideal hand-book for amateurs that we hope the publisher (Mr. John Murray, Albemarle Street) intends it only as the first of a series. For two shillings he gives us, on capital paper, with faultless printing and scores of helpful illustrations, a lucidly written manual by a teacher who evidently has his subject at his fingers' ends.

Bancroft's Americans in London for 1904 is a valuable directory, thoroughly up-to-date.

Readers of Arts and Crafts, we find, are sometimes at a loss to procure the right wood for carving the designs published in this magazine, and others are deterred from undertaking the work on account of the difficulty of getting from the loeal timber yard the small quantity required. This having come to the knowledge of Messrs. Vennelle Brothers (of Gosport, Hants), that enterprising firm of wood-carvers' specialists write to say that they will always be glad to make up the wood for any of our designs, and forward it to any of our readers. They have gone to the trouble of estimating the cost for several of the designs we have already published. We give below their figures, which should be kept for reference, as indicating the cost for similar designs of corresponding dimensions: -

Prices for Supplying Wood for Arts and Crafts Designs.

No.

7.

Block, with moulded edges, for Brass Stationery Case

Bass-wood.

Oak.

Walnut.

Post age.

3/4 in. wood ..

9d.

1/-

1/1

3d.

"

8.

Plaque (plain disc), 3/4 in. wood

Sycamore 1/-

9d.

1/-

1/-

6d.

"

21.

Plaque(plain disci. 3/4 in. wood Sycamore Iod.

7d.

10d.

1/-

4d.

"

10.

"Earth" Panel. 3/4 in. wood.

1/6

2/3

2 0

8d.

"

11.

Bellows Sides, per pair, 1/2 in. thick..... ..

1/3

1/9

2/-

8d.

Miss Ethel Campbell, who kindly allowed us to reproduce the leather card-cases she showed at the Dress Designers' Exhibition, asks us to say that she retains the copyright of the designs.