MERCURY 

 VAPOUR 



LAMPS 



in ordinary or UVIOL Glass, are now extensively 

 used in the 



(JENA MAKE), 



r UVIOL Glass, are no 



Leading Laboratories 



in this country and abroad. 



All Sizes from 10 ins. to 40 ins. 



We supply these LAMPS UNMOUNTED 

 with the necessary SELF INDUCTIONS 



and RHEOSTATS. 

 Also a SPECIAL LABORATORY TYPE. 



Sole Agents for U.K. and Colonies— 



ISENTHAL & CO., 



85, MORTIMER ST., LONDON, W. 



Contractors to 

 Die Admiralty, War, India, and Colonial Offices, dc. 



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



|J W^ ^N DELICIOUS FOR BREAKFAST 



riblL/| <* AFTER DINNER. 



WHITE 



COFFEE. & BLUE 



In making, me less quantity. It being much itrongar than ordinary Coffee 



ENGLAND'S BEST VALUE! 



"BONGOLA" 

 TEA 



Has No Equal. 



EXCELSIOR SARDINES 



DOUBLE CROWN 



* * 



SALMON 

 & LOBSTER. 



In flat ft tall tins, 



paeked from the finest selected Fish 



only, ft cannot be surpassed. 



Perfect Flavour. 

 .Selected from the Finest Fruit. 



EXCELSIOR 

 CANNED 

 GOODS 



PEACHES, 

 APRICOTS, 

 PEARS. 

 GREENGAGES 



PEATMOOR 



OLD Scotch 



WHISKY. 



"Soft. Mellow, Delightful. 



Carries the Wild Rough Scent 



of the Highland Breeze." 



A NEW PATTERN } 



FORTINS 

 STANDARD BAROMETER 



(Registered Design No. 420,297.1 



As will be seen by the illustration, tbiB Barometer is 

 built on original lines. 



By the absence of the ordinary tubular enclosures (in the 

 usual form of instrument) the mercurial column is FULLY 

 EXPOSED to view, NO SHADOWS are thrown upon the 

 column, and therefore an extremelv accurate and instan- 

 taneous reading is made possible. The scales being gradu- 

 ated upon tbo flat side pieces the DIVISIONS AND 

 FIOURES ARE ALWAYS IN VIEW, and the vernier is 

 very much more legible than in the ordinary tubular patterns. 



The bore of the tube is O'S Inch. 



The scales are graduated io incheBand millimetres, and, 

 by means of the verniers, are capable of being sub-divided 

 to read to 0-002 Inch and - l m/m. 



The attached Thermomete r on the body of the instrument 

 is graduated in Fahrenheit and Centigrade scales. 



It is the BOLDEST Standard Barometer made. 



The PRICE IS LOWER than that of any other form of 

 Standard Barometer of the same dimensions. 



It yields readings equally close as the highest priced 

 instruments. 



Price complete, mounted on handsome Polished Solid 

 Mahogany Board, with Brackets for Suspension, and 

 Opal Glass Reflectors, 



£7 lOs. Od. 



SMALLER SIZE, "THE STUDENTS," 



designed for Schools for demonstration work, and small 



private Obsenatonts; bore -25; reading to *01 inch and 



■1 millimetre. 



dB3 7s. 6d. 



Sole Makers cend Ptoprietors of the Registered Design: 



PA8T0RELLI & RAPKIN, Ltd., 



'/ .;// kinds o_f Meteorological ItistrumenU. 

 GARDEN, LONDON, E.G. 



Actual Mamtfactwrt 

 46, H ATT ON 



EBtabliahed 17.">0. Contractor) to H.M. Gori*rnm< 

 Tel phone No. 1081, Holborn. Telegrams— " Rapkin, London." 



STANDARD INSTRUMENTS OF ALL KINDS 



(With Kew Certificates if desired). 



ILLUSTRATED .PRICE LIST POST FREE. 



Wireless 

 Telegraphy 



IMPROVED APPARATUS 



(READY SHORTLY) 



enabling amateurs to receive TUNED or 



SYNTONISED Wireless Messages from all 



existing Stations. 



The apparatus is capable of receiving over 



a range of 300 MILES with an aerial 



elevation of only 50 feet. 



Prices and full particulars on application to the 

 SOLE MANUFACTURERS— 



HARRY W. COX, ltd., 



MANUFACTURING ELECTRICIANS, 



Contractors to many Departments of H.M. Govt., 



la, ROSEBERY AYENUE, & 15-21, LAYSTALL ST., 

 LONDON, E.C. 



PrinteJ and Published lor the Proprietors by Kiso, Sell i 



£ Oldino, Ltd., 27, Chancery Lane, London, W.C.— March. 1907. 



