THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Vol. XIII. (I.S.), lo. 17. MARCH, 1912. 



IMPEOVEMENTS IN EQUATORIAL TELESCOPE 



MOUNTINGS. 



BY 



SIR HOWARD GRUBB, F.R.S., 



VIOE-PEESI0ENT, ROYAL DUBLIN SOCIETY. 



(PLATES XVII. -XIX.) 



[^A uthors alone are responsible for all opinions expressed in their Communications.^ 



DUBLIN: 



PUBLISHED BY THE ROYAL DUBLIN SOCIETY, 

 LEINSTER HOUSE, DUBLIN.) 

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1912. A^ '"■% 



JUN 24 



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