Demetrius Phalareus, perhaps the most learned man of his age, who had been governor of Athens for many years, was the first so appointed.

Under him was the librarian, an office sometimes held by men whose names have descended to our times, as Eratosthenes, and Apollonius Rhodius.
ORGANIZATION OF THE MUSEUM.

In connection with the Museum were a botanical and a zoological garden.

These gardens, as their names import, were for the purpose of facilitating the study of plants and animals.
There was also an astronomical observatory containing armillary spheres, globes, solstitial and equatorial armils, astrolabes, parallactic rules, and other apparatus then in use, the graduation on the divided instruments being into degrees and sixths.

On the floor of this observatory a meridian line was drawn.