30 Art 5— Y. Tela: 



Contents. 



PAGE 



Introduction. 1 



I. Natural occurrences of Schistosfcga osmundacca (Dicks.) Mohe. .. 3 



II. Materials and Methods 10 



in. Influence of Light on the Growtli of the Moss 11 



IV. Influence of Temperature 19 



V. Influence of Humidity 20 



VI. Cultural Experimeuts 22 



VII. Effect of Lime on the Growth of the Moss 24 



VIII. Germination of the Spore and Formation of the Protonema. . . 26 



Summary 27 



m 



Published March Slst, 1918. 



