CCxxvi NATURE [JANUARY 29, 1914 
C. Winthrope -Somerville’s. 
SULPHUR 
IN SPENT OXIDE 
TEST. 
2 ‘ A. reliable and rapid means of 
An important step in the ascertaining the amount of sulphur 
in spent oxide. 
CONDENSER 
STATICAL 
MACHINE 
System : Dr. Wommelsdorf. 
evolution of Influence 
The result is given in percentage 
of sulphur direct. 
ENORMOUS OUTPUT. |] comet instrctons with cach tet 
ISENTHAL & CO The set complete, £3 3 0 
(Department 1), 
Denzil. Works, Neasden, London, N.W. 
Contractors to the 6 ae pig India, and Colonial T OW N Ie) N & M E Fy C FE R - 
LTD. 
34 CAMOMILE ST., LONDON, E.C. 
WERGURY DISTILLATION 
APPARATUS, 
(Registered No. 598494.) 
Designed by Mr. B. LAMBERT. 
Price complete 
(List No. X2278a) 
HRS :10: 0 
A=NEW AND THE MOST EFFICIENT APPARATUS 
FOR DISTILLING MERCURY IN VACUO. 
The new and registered part is the head with its water- 
cooler inside the vacuum. jacket by means of which a 
very rapid distillation of mercury is possible, yielding 
from 2-3 lbs. per hour. y 
Machines. 
SOLE MAKERS: 
SCIENTIFIC INSTRUMENTS 
OF ALL DESCRIPTIONS. 
The “* HARRIS” 
SPECTROMETER. 
@ 
A cheap and reliable Instrument specially designed tor 
tudents’ use 
Very strongly constructed so that it may be used by 
elementary pupils without being put out of order, 
PRICE £2°: 10:0 Each Net. 
Descriptive Pamphlet on application. 
PHILIP HARRIS & CO., i10.| 
BIRMINGHAM : 
(ENGLAND.) 
This apparatus may be seen working 
at our Showrooms, by appointment. 
Write for Circular No. 159, which shows the apparatus t 
illustrated and gives full instructions. \ 
Sole Makers: 
A. GALLENKAMP & CoO., Ltd. 
19 & 21 SUN STREET, LONDON; E.C. 
Printed by Ricuarp CLay & Sons, Limirep, at Brunswick Street, Stamford Street, S.E., and published by MAcMILLAN AND Co., LimirEp, at 
t. Martin's Street, London, W.C., and THe Macmitian Co., 66 Fifth Avenue, New York.—THurspAy, January 29, 1914. 
