Page 58: From Barnfeild, ... changed to From Barnfield, .... Page 85: closing bracket deleted after ... Table VII. and Fig. 13. Page 90, Table VIII, column 5: 350·000 and 150·000 changed to 350,000 and 150,000. Page 97: No creature lies or dies to itself, ... changed to No creature lives or dies to itself, ... Page 104: Danske Aerofile Alghe changed to Danske Aërofile Alger. Page 114: Recherche sulla Malattia del Riso ... changed to Ricerche sulla Malattia del Riso .... Page 115: ... sur de polymorphisme ... changed to ... sur le polymorphisme .... Page 116: literature notes 38 (Robbins) and 48 (Schindler) changed to 33 and 34 respectively. Page 120: Zygorrhynchus vuillemini changed to Zygorrhynchus vuilleminii as elsewhere. Page 126: references to Waksman[24] and [24_e_] changed to [25] and [25_e_]. Page 129: ... preparée de la pres de Russum ... changed to ... préparée de la terre humeuse du Spanderswoud, près de Bussum .... Page 134: reference to Kohshi[24] changed to [34]. Page 143: Sämenbildung changed to Säurenbildung (entry 5); Wurzelbranderregern im Baden changed to Wurzelbranderregern im Boden (entry 11). Page 144: ... Umwandlung von Aminosamen in Oxysämen ... changed to ... Umwandlung von Aminosäuren in Oxysäuren ....; ... Wirkungen der Schimmelze ... changed to ... Wirkungen der Schimmelpilze ....; Hydrogen-iron concentration changed to Hydrogen-ion concentration. Page 145: Ztschr. f. Garungs. Physiol. changed to Ztschr. f. Gärungsphysiol. Page 146: einige Pilze gegen Hemizellulosen changed to einiger Pilze gegen Hemicellulosen. Page 157: Such responses are known chemotropism ... changed to Such responses are known as chemotropism .... Page 170: ... alphatic amino-acids ... changed to ... aliphatic amino-acids ....