Myringotomy could be relieved by myringotomy, which equalized the pressure on each side of the tympanic membrane. Widespread inappropriate use of the procedure later led to it falling out of use. However, it was reintroduced by Hermann Schwartze in the 19th century. An inherent problem became recognized, namely the tendency of the tympanic membrane to heal spontaneously and rapidly, reversing the beneficial effects of the perforation. In order to prevent this, a tympanostomy tube, initially made of gold foil, was placed through the incision to prevent it from closing. Ádám Politzer, a Hungarian-born otologist practicing in Vienna, experimented with rubber in
River incision and diverse ecosystems on the planet and are for this reason the focus of many restoration projects throughout the United States. At low erosion rates increased stream incision may make gentle slopes to erode creating convex-up forms. Convex slopes around a stream can thus indirectly reflect accelerated crustal uplift. This is because accelerated incision may trigger accelerated erosion on the adjacent slopes creating slopes progressively steeper slopes that are in equilibrium with high erosion rates. River incision River incision is the narrow erosion caused by a river or stream that is far from its base level. River incision is common