300 
rorULAR SCIENCE REVIEW. 
Polarity of the Diamagnetic Force ; Faraday’s Letter to Matteucci on Dia- 
magnetic Polarity ; The Relation of Diamagnetic Polarity to Magne-Crys- 
tallic Action; Faraday on Magnetic Polarity; A Magnetic Medium in 
Space ; Thomson on the Magnetic Medium, and on the Effects of Compres- 
sion ; Weber on Diamagnetism ; On Reciprocal Molecular Reduction ; 
Thomson on Reciprocal Action of Diamagnetic Particles ; Faraday on Mag- 
netic Hypotheses ; Mechanical Effects of Magnetisation ; Influence of 
Material Aggregation on Manifestations of Force ; Diamagnetic Repulsion ; 
Disposition of Force in Diamagnetic and Paramagnetic bodies ; Currents of 
the Leyden Battery ; Influence of Magnetic Force on the Electric Discharge ; 
The Magnetic Field and the Electric Current ; Reduction of Temperatures 
by Electricity ; The Polymagnet : Magnus’ Investigation of the Electric 
Currents; Kohlrausch’s Verification of the Theory of Ohm; and lastly, 
On Electro-Magnetic Attractions. 
RUSTIC ORNAMENTATION.* 
T HOUGH not a scientific work, this is a book which, as it tells us much 
concerning the best and most artistic methods of constructing aquaria, 
fern-cases, and window-gardens, must find a place on the drawing-room table 
of all who are not only interested in scientific entertainment, but are also 
gifted with an eye for what is pretty and ornamental. It is a handsome 
volume, showily illustrated, richly bound, well printed, and containing a 
great many useful hints borrowed from the experience of a gentleman who 
is no mean authority on the subject he has taken in hand. 
Alpine Floicers for English Gardens. By W. Robinson, F.L.S. London : 
John Murray, 1870. — Mr. Robinson has in this work put together a quantity 
of information which no doubt will be of great interest to those who are 
desirous of extending the limits of the ordinary garden flora. The illustra- 
tions are not numerous, but are to the point. 
Notes of a Course of Nine Lectures on Light , delivered at the Royal Institu- 
tion of Great Britain , April 8 to June 3, 1869. By John Tyndall, LL.D., 
F.R.S. London: Longmans, 1870. — These notes comprise an extended 
syllabus of the lectures delivered by Dr. Tyndall. They form valuable 
headings for those who desire to pursue a systematic and advanced course of 
optical studies, and for the junior student they constitute an excellent manual 
— we should say the best in the English language. 
Irregularities of the Teeth. By Henry Sewill, M.R.C.S., &c. London : 
Churchill, 1870. — This is a reprint of some very good practical papers pub- 
lished originally in the Lancet and British Medical Journal. Mr. Sewill 
understands his subject, and displays great practical skill in the application 
of his art to the removal of dental deformities. 
* “ Rustic Adornments for Houses of Taste.” By Shirley Ilibberd. Lon- 
don : Groombridge, 1870. 
