An important investigation undertaken by the Bacterioscopical Laboratory, with regard to the pollution of the Venetian canals by the city sewage, led to the discovery that the water of the lagoons possesses auto-purifying power, not only in the large canals but even in the smallest ramifications of the waterways.
Cramer, gives a survey of the origin and ramifications of the movement in Europe and America.
To the north of the Enns are ramifications of the Salzkammergut and Enns Alps, which include the Dachstein (9830 ft.), and the Grimming (7713 ft.), and the groups of the Todtes Gebirge (6890 ft.) and of the Pyrgas with the Grosser Pyrgas (7360 ft.).
The principal ramifications of the primitive Alps of Carinthia and Styria are: the Stang Alps with the Kenigsstuhl (7646 ft.) and Eisenhut (8007 ft.), the Judenburger or Seethaler Alps with the Zirbitzkogel (7862 ft.), and the Koralpen which culminates in the Grosser Speikkogel (7023 ft.).
South of the Drave Styria is traversed by the following ramifications of the southern zone of the eastern Alps: the Bacher Gebirge with the Cerni Vrch or Schwarzer Berg (5078 ft.), and the Sannthaler or Steiner Alps with the Oistriza (77 0 9 ft.) and the highest peak of the group, the Grintovc or Grintouz (8429 ft.), which is situated on the threefold boundary of Carinthia, Carniola and Styria.