160 Reviews. 
These examination papers are arranged for students in science classes and 
for teachers preparing for the Government certificate in mathematics. The 
questions are well selected, and a useful summary of algebraical and trigono- 
metrical formulze is placed at the beginning of the book. 
MorratTr’s ELEMENTS OF Euc.ip, Books I.—II., and Ele- 
mentary Mensuration, with Explanatory Notes, Exercises, and Deductions 
worked out as Models. Third edition, revised and enlarged. 12mo, pp. 206. 
(London: Moffatt and Paige.) Price 2s. 
The arrangement of the text will be helpful to the young student. The 
notes and deductions are very good, as also are the hints given for solving 
‘‘yiders.” For testing his knowledge of the order of Euclid’s propositions, the 
enunciations are given separately. The mensuration appended is a capital way 
of showing the practical side of geometry, and we cannot speak too highly of 
the last 40 pages. === 
TRAITE PRATIQUE DE PHoToTyPigE. Par Geymet. Nouvelle 
edition. 
TRAITE PRATIQUE DE PHOTOLITHOGRAPHIE. Par Geymet. 
Troisiéme édition, entiérement refondue et augmentee. 
TRAITE PRATIQUE D’IMPRESSION PHOTOGRAPHIQUE, aux 
encres grasses de Phototypographie et de Photogravure. Par Moock. 3¢ 
édition, entiérement refondue par Geymet. 
TRAITE PRATIQUE DE -GRAVURE EN DEMI-TEINTE. Par 
L’Intervention exclusive. Du Cliche Photographique. Par Geymet. 
Paris: Gauthier Villars et Fils, editeurs de la Bibliothéque Photogra- 
phique. (Quai des Grands-Augustins. 1888.) 
We have before us four treatises, issuing from the prolific press of Messrs. 
Gauthier- Villars, which deal with photography in what, if not new, is one of its 
most important aspects. So long as the reproduction of the images of the 
camera was confined to proofs obtained by a second photographic process, so 
long must its results be very limited, both as to number and utility. With the 
introduction of a process, however imperfect, whereby the photographic image 
could be transferred to some medium, from which it could be printed off after 
the manner of an engraved plate, or a lithographic stone, or of type, a new 
era commences. And now, as a matter of business, it seems as if it were in 
this direction that the future of photography lies. Those who take an interest 
in the application of photography to book-illustration, to business purposes, 
and to the innumerable uses to which cheap and correct delineation of objects 
can be applied, will receive much information from Mons, Geymet’s treatises, 
which lay down very clearly the fundamental principles on which the various 
processes are based, and then go into all the details with a precision that 
leaves nothing to be desired. 
THE TakING OF Dover. By H. F. Lester. Crown 8vo, pp. 
44. (Bristol: Arrowsmith. London: Simpkin, Marshall, and Co.) Price 6d. 
It is not often that we can afford space for this class of book. The 
one before us, however, may form an exception. It is supposed to be the 
translation of a French letter written in 1898 from the General by whose 
schemings Dover was captured in 1894, to his son, astudent at St. Cyr 
Military Training College. The narrative is, of course, overdrawn, but is 
nevertheless worth reading. —_——— 
PHOTOGRAPHIC Houipay Work is the summer special number 
of the AMATEUR PHOTOGRAPHER, and is an out-and-out good number ; we 
advise all our Photographic friends to secure a copy. We are told a second 
edition has already been called for. 
