Galvanized iron by its zinc surface is protected from corrosion by the weather, though the protection is not very efficient in the presence of acid or sulphurous fumes, and accordingly it is extensively employed for roofing, especially in the form of corrugated sheets.
His further promotion was rapid; at the instance of Pope Pius, who thought his talents would be best employed at the bar, he became votante di segnatura, and, on the first vacancy, auditor of the Rota for Rome.
At small heights Exner (27) has employed captive balloons, provided with a burning fuse, and carrying a wire connected with an electroscope on the ground.
This was confirmed by Elster and Geitel (7), whose form of dissipation apparatus has been employed in most recent work.
The mean of and a_ is usually denoted by a± or simply by a, while q is employed for the ratio a_/a+.