Lateral (roll) control is achieved through conventional differential flap operation.

The Mirage also adds an elevator trim tab and electrical flap operation.

He would perform several of these operations in the following years, and in 1886 switched to a superiorly based flap operation.

He introduced a flap operation for treatment of cataracts (Beer's operation), as well as popularizing the instrument used to perform the surgery (Beer's knife).

SZD-19-2 Zefir 2 - Two prototypes of re-designed Zefir with wooden wings, manual flap operation and other improvements.

This amusing and still informative treatise describes how he used turpentine to arrest a haemorrhage, describes the flap operation in amputation and shows that he was familiar with tourniquets to stop bleeding during operations.

He was awarded this at the 6th World Impotence Meeting on Impotence, Singapore, 1994, for having described a new penile dermal flap operation for Peyronie's disease - a disease which can cause impotence.