Supplement to ‘ Nature,” June 30, 1923 i 
IMPROVED 
“PEANDAR FORTINETTE” 
STANDARD BAROMETER 
This Barometer has been designed 
to meet the requirements of 
Chemical Laboratories, Gas 
Works, Private Observers, 
Colleges, etc., for an instrument 
“giving exact readings at a 
moderate cost. The Frame, 
which is made of solid drawn 
' brass tube, is enamelled black 
and finished in the very best 
manner, and is mounted on a 
polished oak board, with brackets 
for adjustment, and opal glass 
reflectors behind the scales and 
glass cistern. Each instrument 
is engraved The Improved 
“ Peandar Fortinette ” Standard 
Barometer. 
BORE OF TUBE - ‘25-inch 
The Scales are engine-divided, 
and engraved on the brass body 
to ‘05 inch and | millimetre, and 
read by the verniers to *005 inch 
and ‘1 mm., and are protected 
by an air-tight glass cover. 
The Thermometer has_ both 
Fahrenheit and Centigrade scales, 
and is protected by a metal frame. 
Price, complete as_ illustrated, 
Ei f D 
National Physical Laboratory 
Certificate - £2 2 O extra. 
Sent Carriage Paid, and safe 
* delivery guaranteed, within the 
United Kingdom. 
maxerss PASTORELLI & RAPKIN L?® 
46 HATTON GARDEN, LONDON, E.C.1 
Actual Manufacturers of BAROMETERS, THERMOMETERS, BAROGRAPHS, 
THERMOGRAPHS, HYGROGRAPHS, RAIN GAUGES, HYDROMETERS, etc. 

PRICE LISTS POST FREE ON APPLICATION. 

Any instrument sent on approval if desired. 
Telegrams—“ Rapkin, London.” 
ESTABLISHED 1750. 
Telephone—Holborn 1981. 

