[May, 1902.] 
THE 
SCIENTIFIC TRANSACTIONS 
OF THE 
ROYAL DUBLIN SOCIETY. 
VOLUME VII—(SERIES IL) 
XY. 
SOME NEW FORMS OF GEODETICAL INSTRUMENTS. 
BY 
SIR HOWARD GRUBB, E.B.S., 
Vice-Pres. Royal Dublin Society. 
(Prate XXXIV.) 
DUBLIN: 
PUBLISHED BY THE ROYAL DUBLIN SOCIETY. 
WILLIAMS AND NORGATEHE, 
14, HENRIETTA STREET, COVENT GARDEN, LONDON; 
20, SOUTH FREDERICK STREET, EDINBURGH; anp 7, BROAD STREET, OXFORD. 
PRINTED AT THE UNIVERSITY PRESS, BY PONSONBY AND WELDRICK. 
1902. 
