THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Yol. XII. (I.S.), lo. 32. MAT, 1910. 



A SIMPLE FORM OF OPEN-SCALE ISOTHERMAL 

 AIR BAROMETER. 



W. F. BARRETT, F.R.S. ^ ^' 



[A uthors alone are responsible for all opinions expressed in their Communicaiions.~] 



DUBLIN : 



PUBLISHED BY THE ROYAL DUBLIN SOCIETY, 



LEINSTEE- HOUSE, DUBLIN, 



WILLIAMS AND NORGATE, 



14, HENRIETTA STEEET, COVENT GARDEN, LONDON, W.C. 



1910. 



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