74 
POPULAR SCIENCE REVIEW. 
an art, and we know of no work from which so much may be gathered in so 
short a time. Its arrangement has been well planned, and its matter is ex- 
cellently arranged, and, so far as we can see, made intelligible to the feeblest 
by putting the difficult problems in a multitude of ways. It is so arranged 
that anyone, be he ever so simple, can understand it. It may seem unusual, 
but we cannot avoid giving the contents; for they show, even more than 
any words of ours, how admirably the scheme of the work is carried out. 
The first part is of course introductory. Then follows advice to the student 
as to his form of application, various examples of the subject of examination 
being given; and next we have information as to officials. Then follow in 
proper order a long list : — scale of charges, delivery of telegrams, double 
needle instrument, single needle instrument, Morse’s printing instrument, 
grouping of letters of different alphabets, Hughes’ printing instrument, bell 
instrument, Wheatstone’s automatic machine, Wheatstone’s ABC instru- 
ment, pneumatic code, postal telegraph codes, miscellaneous regulations, 
inland telegraph-forms, abstracts, abstract books, accounts, returns, railway 
companies’ messages and forms, railway-train telegraphs, offences, useful 
hints, telegrams and index. Altogether a most valuable, indeed invaluable, 
amount of information to the telegraph clerk. 
ERE we have two books in Messrs. Longmans’ “ Text-book of Science” 
series. They have quite recently reached us, and we are compelled to 
say of them that they undo the impression left upon our mind by the 
Manual of Machinery which we had seen as the first, and which we have 
noticed rather unfavourably. The present two works have left a satisfactory 
feeling upon our mind. They bear out the view expressed by the publishers, 
that “ the works will not be manuals for immediate application, nor uni- 
versity text-books, in which mental training is the principal object; but are 
meant to be practical treatises , sound and exact in their logic , and with 
everything and every process reduced to the stage of direct and useful ap- 
plication, and illustrated by well-selected examples from familiar processes 
and facts. It is hoped that the publication of these books — in addition to 
other useful results — will tend to the leading up of artisans to become can- 
didates for the Whitworth Scholarships.” We think, as we have said, that 
the authors of the present works — one of them unhappily removed from 
among us — have done their work well, and in accordance with the plan on 
which the volumes themselves are laid down. 
And first of Mr. Bloxam's labours. His has been the most laborious task. 
Metallurgy is not a subject so frequently treated of as Chemistry. He had, 
* “Metals; their Properties and Treatment.” By Charles Loudon 
Bloxam, Professor of Practical Chemistry in King’s College, London. Lon- 
don : Longmans. 1870. 
“ Introduction to the Study of Inorganic Chemistry.” By William 
Allen Miller, M.D., D.C.L., late Treasurer and Vice-President of the Royal 
Society, Professor of Chemistry in King’s College, &c. Longmans. 18*71. 
CHEMISTRY AND METALLURGY.* 
