THE GEOGRAPHICAL SOCIETY. 449 
Interior the sum of one thousand francs. Many other sub- 
scriptions have been received or announced for the same 
object. 
The Society of Geography, charged by the donors 
to decree the reward, and vrishing to take a direct part 
in the encouragement of so important a discovery, has 
resolved moreover to offer a gold medal of the value of 
two thousand francs to the traveller who, independently 
of the conditions already declared, shall have satisfied, as 
far as possible those which are explained below. 
The Society demands a manuscript narrative, with 
a geographical map, founded upon celestial observations. 
The author shall endeavour to study the country with 
reference to the principal points of its physical geography. 
He shall observe the nature of the soil, the depth of the 
wells, their temperature and that of their sources, the 
width and the rapidity of the rivers, the colour and the 
clearness of their waters, and the productions of the coun- 
tries which they irrigate. He shall make remarks upon 
the climate, and determine in various places, if possible, 
the declination and inclination of the magnetic needle. 
He shall strive to observe the different breeds of animals, 
and to make some collections in natural history, such as 
fossils, shells, and plants. 
When he shall have arrived at Timbuctoo, if he 
cannot go further, he shall acquaint himself with the 
routes leading to Kachnah, Haoussa, Bournou, and lake 
VOL. II. 2 G 
