INSULATION TESTER, 



to 20 



wi th 



Readings 



nt of 



diictor. 



CHEAP ANO EFFICIENT. 



Full I'lUlk-iiUir.^ <[!' aliorr, a/a.i 



A New Form of Wheatstone Bridge and many other 

 Laboratory Measuring Instruments 



Are com. MM, ,1 in our ILLUSTRATED CATALOGUE OF ELECTRICAL 



MEASURING INSTRUMENTS. "Iiich Mi.iy he had on applicalion. 



ISENTHAIj & CO., 



85, MORTIMER ST., LONDON, W. 



Coiitiactoys to the Admiralty, War. India, and Colonial Offices. >~,-. 



Ask your GROCER for TO-DAY'S Leading Lines. 



DELICIOUS FOR BREAKFAST 

 & AFTER DINNER. 



RED, 



WHITE 



COFFEE, t BLUE 



In making, use leBB quantity, H being much itronger than ordinary Coffee , 





ENGLAND'S BEST VALUE! 



"BONGOLA" 

 TEA 



Has No Equal. 



EXCELSIOR SARDINES 

 DOUBLE GROWN 



lb d? 



SALMON 

 & LOBSTER. 



In nat a tall tins, 



pftoked from the finest selected Fish 



only, * cannot be Bumassed. 



Perfect Flavour. 

 Selected from the Finest Fruit. 



EXCELSIOR 

 CANNED 



APRICOTS, GDDDS 



PEARS, ^m-^'^mm'^m 



GREENGAGES. 



PEATMOOR 



OLD Scotch 



WHISKY. 



■' Soft, Mellow, Delightful. 



Carries the Wild Rough 5cent 

 of the Highland Breeze." 



BOLD THROUGHOUT THE WORLD BY 



6R0CERS, TEA & COFFEE DEALERS, & ITALIAN WAREHOUSEMEN. 



■ HENSOLDT'S ■ 

 NEW PRISM BINOCULARS 



ARE UNEQUALLED for BRIGHTNESS. 



They can be readily cleaned by any one. 



t 



The 



Neatest 



and Most 



Compact ■ 

 Prism . . 

 Binocular. 



Jnlaxial Arrangement of Eyepiece 



Prism, and Object Glass, obviating 



lateral Displacement of Rays. 



P ower from 3i to 12 times. 

 MAY BE OBTAINED FROM ANY GOOD-CLASS OPTICIAN. 



WHOLESALE— 



M. HENSOLDT & SONS, 38, holborn viaduct, London, e.c. 



LARGE INDUCTION COILS. 



FOR SPECTRUM ANALYSIS, WIRELESS TELEGRAPHY, AND 

 OTHER SCIENCE WORK ANO RADIOGRAPHY. 



With adjustable '.condenser and primary, and (if desired) wound on the 

 multisectional principle. 



The output from our Coils is exceptionally heavy, tlie dischsrpe being intensified 

 to such a degree that the spark is CONVERTED INTO A FLAME. 



All our Coils are guaranteed for 5 years. They give the best results in Laboratory. 

 \-Ray. and High Frequency work, and aie used by the leading Universities, 

 Hospitals, and Practitioners at Home and abioad. 



Call and He them at irork or write for L(.<(. 

 fW SPECIAL TERMS TO SCIENTIFIC INSTITUTIONS. 



HARRY VSl. COX, Ltd., 



MANUFACTURING ELECTRICIANS, 



Contractors to many Departments of H.M. Govt. 



Factory. Showrooms, and Offices: 



la, ROSEBERY AVEN UE, & 15-21, LAYSTALL ST ., LONDON, E.C. 



vr SUPPLEMENTARY LIST (covering all our latest inventions) free. 



Printed and I'ublished for tlie I'ropvittois by Ki.ni^ Sell A' Olli.ni^, Ltd., 27, Chancery Lane, London, Vi'.C.—tebrunri/, 1907. 



