( 604 ) 
terous, these voyage would also present an occasion of determining 
the longitude by transport of chronometers. Unfortunately the results 
given by the different chronometers were so diverging as to be of no 
value whatsoever. 
The report above mentioned of GrrMain’s determination is accom- 
panied by a plan showing his place of observation. We see from 
this plan that west of the town the river St. Denis runs nearly in 
a north-north-westerly direction towards the sea and that the place 
of observation of GERMAIN was still on the west of the river. 
A briek pillar, on which stood his transit instrument in 1867 
and 1868, was still extant during our stay in 1874. 
The result of Gerrmatn’s determination of longitude and latitude 
was given by him as follows : 
Longitude of the place of observation east of Paris 332™25s,7 
Reduction to the flag-staff, east of the Barachois (7. e. 
of the little creek which protects the sloops in landing) + 1 ,07 
Longitude of the flag-staff east of Paris, (sic.:) . . 3"32™26s,8 
Southern latitude of the place of observation deter- 
mined by 4 northern and 3 southern stars . . . . 20°52! 2",0 
Reducuon 10 the; lac stane se ee — 23 ,7 
Southern latitude of the flag-staff. . . . . . . 20°51'38"3 
Our observations of occultations took place at different points, the 
relative position of which was accurately determined by Mr. Sorters. 
Taking the difference of longitude of Paris and Greenwich 
= 9m20:63 from the Nautical Almanac of 1874, (as given at that 
time both in the C. d. T. and in the N. A), we got from the num- 
bers just mentioned, for the flag-staff 3'41™47,43 east of Greenwich. 
Corresponding therewith : 
Place of observation : Long. E.of Gr. _ Latitude 
1st on the ground of the harbour office 3'41™47s,32 — 20°51'40",6 
Dd 8 +. ,, our dwelling house, 
NG lank wesdue Conseil aes nneeee 48 11 46 1 
3°¢ Near or in the pavilion of the helio- 
meter on the battery 
y 47 81 35 „3 
The calculation of the longitude from the occultations has been 
‘arried out on printed forms, arranged according to the method which 
I developed in the Astronomische Nachrichten N°. 1763. 
In this method the declination of the moon is taken from the 
