AT al ou 
if : 
ITAA i 
i Para Ss co i 
PROFESSOR STRVRLLY'S. 
Set Registering Barometer 
DESCRIPTION OF THE ENGRAVING 
The Barometer tube tirmly tived in its place dipping at bottom into 
the listen supported by 
the Frame resting upon 
the Stem or Pilar of 
the Hydrometer floating a the tlaid im 
a Vessel firmly tired in tts place 
the Pncal attached w the trame F shewing the height of the Barometer 
upon the ruled sheet of paper at 9% A.M. 
1 2 3 rd 5 6 7 
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ie era 
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