Tt Jour. Sei Vol’ XXIX Jany. 1860. 
: i 
SE UTR teh 
Fig. £ a 
JHLANES APPARATUS for a visual mtethod of 
effecting a precise automatic comparison of :.time 
between distant Stations 
Station B. 
ec 
UU Le 
= a mand 
Hiei 
i 
Witt 
PLATE a] 
