Dibdin, Thomas Frognall; Spencer, George John [Bearb.]: Bibliotheca Spenceriana: or a descriptive catalogue of the books printed in the fifteenth century, and of many valuable first editions, in the library of George John Earl Spencer (Band 3) (London, 1814) [Cicognara, 4650-3]

502 MISCELLANEOUS. sVenice; 1478.

difFerent elements, and spheres of the several planets. The signatures
a, and b, run in eights. On the reverse of d 5, is another eut or
diagram ; and on the recto of the ensuing and last leaf, at bottom, we
read this subscription:

Iohannis de sacrobusto anglici uiri cla/
rissimi Spera mundi feliciter explicit.

The reverse is blank. On the recto of the ensuing leaf e (l) com-
mences the treatise of Gerardus Cremonensis, with the following
prefix—printed in red :

Gerardi cremonensis uiri clarissimi
Theorica planetaru feliciter incipit.

The second page of this treatise contains the following, not unsuccess-
fully executed, representation of the Orbit, or Theory, of the Sun:

Theorica Solis,