Hubert, Thomas, of Liège, [138]
Humidi, academy of, [15]
Hydrostatic difficulties of the Duke of Ferrara, [97]
disputes arising from, [98], et seq.
I.
Improvisation, talents needful for, [400]
tendencies of, [401]
Indulgence to Ferrara, [48]
Innocent X., Pope, [351]
his early preferments, [352]