452 TRANSIT OF VENUS, 1874. KERGUELEN ISLAND. SUPPLY BAV. 



Lieut. Corbet was provided with the following instruments : 



A portable transit instrument. 



A portable altazimuth. 



An astronomical clock. 



12 chronometers. 



A 4-inch achromatic telescope, on tripod stand, by Simms. 



A 3J-inch achromatic telescope, on tripod stand, by Dollond (lent from 

 the Cambridge Observatory). 



Mercurial and aneroid barometers, thermometers, prismatic com- 

 pass, &c. 



Observations for local time, with both the transit instrument and the 

 altazimuth, were as continuous as the bad weather permitted, from Decem- 

 ber 4 to December 21 ; and the latitude was sufficiently well determined. 



On December 17 Mr. Corbet left the station in charge of Mr. Coke, and 

 commenced the work of connecting the various stations with the chrono- 

 meters. On December 21 he returned and dismantled the station. 



The clock by Baker was lent by the Council of the Royal Astronomical 

 Society. The pendulum was compensated on the gridiron principle. The 

 movements were put into good repair before leaving England. 



The following is a list of the chronometers : 



A. Arnold 536. 



B. McCabe 36o. 



C. Loseby n3. 



D. Poole3i64. 



E. Dent 1981. 



F. Hewitt 991. 



G. Frodsham and Baker 6149. 

 H. Frodsham andBaker6i88. 



/. Dent 1916. 

 m. Muston 6 1 1 . 

 n. Molyneux 1061. 

 S. Kullberg 2177. 

 Z. C. Frodsham 6004. 



The portable transit, kindly lent by H. Kains Jackson, Esq., of Orpington, 

 is by Troughton and Simms, of three inches aperture. It was supported 

 on an iron stand, which was intended to rest upon a pier of masonry. 



