Supplement to '^ I^ature" December 29, 192 1 



THERMOMETERS FOR CHEMICAL LARORATORIES 



With Normal Glass Bulbs. 

 OUR OWN MANUFACTURE. GUARANTEED ACCURATE. 



Best Quality Stem-divUled Chemical Thermometers 



I SETS. OF STANDARD THERMOMETERS 

 I divided to t° and iV 



% With National Physical Laboratory Certificates. 



c 



h 



£ SPECIAL THERMOMETERS OF ANY LENGTH 



\ OR RANGE MADE TO ORDER IN A FEW DAYS, 



I PASTORELLI & RAPKIN LIL. 



r 



i? Contractors to Various Departments of H.M. Government 



46 HATTON GARDEN, LONDON, E.C.I. 



Actual Manufacturers of 



THERMOMETERS FOR ALL INDUSTRIAL PURPOSES 



Barometers, Barographs, Thermograplis, Hygrograplis, 

 Hydrometers, Standard Meteorological Instruments, Etc. 



ILLUSTRATED PRICE LISTS ON APPLICATION 



'Phone— Holborn 1981 Telegrams— Rapkia, London*; 



ESTABLISHED 1730. 



Carriage paid and safe delivery guaranteed of all Instruments within the United 



-6 



Kingdom 



