(NOVEMBER, 1877.] 
THE 
SCIENTIFIC TRANSACTIONS. 
OF THE 
ROYAL DUBLIN SOCIETY. 
VOLUME I. (NEW SERIES). 
MEMOIR No. 1. 
ON GREAT TELESCOPES OF THE FUTURE. 
BY 
HOWARD GROUBB, ih. A.S., 
HONORARY MASTER IN ENGINEHRING, UNIVERSITY OF DUBLIN, 
{READ BEFORE THE SOCIETY, FEBRUARY 19TH, 1877,} 
Publishes by the Royal Aublin Society, 
ee 
Aaysonian Instity >> 
\ ON 
S 19, 
OCT 4 1911 
VV. ; a 74 
onal Muse’ 
poe oe 
easier 
DUBLIN: 
PRINTED BY ALEXANDER THOM, 87 & 88, ABBEY-STREET, 
PRINTER TO THE QUEEN'S MOST EXCELLENT MAJESTY. 
FOR HER MAJHSTY'S STATIONERY OFFICE, 
1877. 
Lies 
