Page:The origin of continents and oceans - Wegener, tr. Skerl - 1924.djvu/101

Frech, Fritz, Handlirsch, Haug, Ihering, Karpinsky, Koken, Koszmat, Katzer, Lapparent, Matthew, Neumayr, Ortmann, Osborn, Schuchert, Uhlig and Willis. The table on p. 74 shows an extract from Arldt’s statistics, and the first four land-bridges are illustrated by curves in Fig. 15.

Fig. 15.—Votes on the question of the four post-Cambrian land-bridges.

The number of favourable votes is shown by the upper thick curve, the number of unfavourable votes by the lower thick curve. The difference is simply shaded if favourable; cross-hatched if unfavourable.

In this, three curves are drawn for each land-bridge, namely, for the number of votes in favour, of those in opposition, and of the difference, the latter thus giving the strength of the majority; this is emphasized by shading on the area concerned. These four early land-bridges are those extending over present-day oceanic areas, and are of special interest to us. The result, as is seen, is very clear in its broadest outlines in spite