[May, 1902.] 
THE 
SCIENTIFIC TRANSACTIONS 
OF THE 
EnOnes DUBLIN SOCIRIY. 
VOLUME VIL—(SERIES IL.) 
XV. 
SOME NEW FORMS OF GEODETICAL INSTRUMENTS. 
BY 
SIR HOWARD GRUBB, EF.B.S., 
Vice-Pres. Royal Dublin Society. 
(Pirate XXXIV.) 
DUBLIN: 
PUBLISHED BY THE ROYAL DUBLIN SOCIETY. 
WILLIAMS AND NORGATE, 
14, HENRIETTA STREET, COVENT GARDEN, LONDON; 
20, SOULH FREDERICK STREET, EDINBURGH; anv 7, BROAD STREET, OXFORD. 
PRINTED AT THE UNIVERSITY PRESS, BY PONSONBY AND WELDRICK. 
1902. 
Price One Shilling. 
— =. 
SE rey pS 
SMensonian Ins a SS 
J MU | 
W. J 
Vy 
ral Museum. 
a 
