Demonstrator of Physics and
Chemistry, and Teacher of Radiography in St. George's Hospital Medical
School. Demy 8vo. 12 Plates from Photographs of X Ray Work. 52
Illustrations. 200 pp. 1901. Price 10s. 6d.; India and Colonies, 11s.;
Other Countries, 12s.; strictly net.

=Contents.=

Part I., =Historical=--Chapters I., Introduction.--II., Work leading up
to the Discovery of the X Rays.--III., The Discovery.

Part II., =Apparatus and its Management=--Chapters I., Electrical
Terms.--II., Sources of Electricity.--III., Induction Coils.--IV.,
Electrostatic Machines.--V., Tubes.--VI., Air Pumps.--VII., Tube Holders
and Stereoscopic Apparatus.--VIII., Fluorescent Screens.

Part III., =Practical X Ray Work=--Chapters I., Installations.--II.,
Radioscopy.--III., Radiography.--IV., X Rays in Dentistry.--V., X Rays
in Chemistry.--VI., X Rays in War.--Index.

=List of Plates.=

_Frontispiece_--Congenital Dislocation of Hip-Joint.--I., Needle in
Finger.--II., Needle in Foot.--III., Revolver Bullet in Calf and
Leg.--IV., A Method of Localisation.--V., Stellate Fracture of Patella
showing shadow of "Strapping".--VI., Sarcoma.--VII., Six-weeks'-old
Injury to Elbow showing new Growth of Bone.--VIII., Old Fracture of
Tibia and Fibula badly set.--IX., Heart Shadow.--X., Fractured Femur
showing Grain of Splint.--XI., Barrell's Method of Localisation.

* * * * *

=DRYING BY MEANS OF AIR AND STEAM.= Explanations, Formulae, and Tables
for Use in Practice. Translated from the German of E. HAUSBRAND. Two
Diagrams and Thirteen Tables. Demy 8vo. 1901. 72 pp. Price 5s.; India
and Colonies, 5s. 6d.; Other Countries, 6s.; strictly net.

=Contents.=

Preface.--British and Metric Systems Compared--Centigrade and Fahr.
Thermometers.--Chapters I, Introduction.--II., Estimation of the Maximum
Weight of Saturated Aqueous Vapour which can be contained in 1 kilo. of
Air at Different Pressure and Temperatures.--III., Calculation of the
Necessary Weight and Volume of Air, and of the Least Expenditure of
Heat, per Drying Apparatus with Heated Air, at the Atmospheric Pressure:
_A_, With the Assumption that the Air is _Completely Saturated_ with
Vapour both before Entry and after Exit from the Apparatus.--_B_, When
the Atmospheric Air is Completely Saturated _before entry_, but at its
_exit_ is _only_ 3/4, 1/2 or 1/4 Saturated.--_C_, When the Atmospheric
Air is _not_ Saturated with Moisture before Entering the Drying
A