N O T E S 



1. (p. i). ANTON v. LEEUWENHOEK, Arcana naturae detecta. The figure dates from 



the year 1683, and is taken from a new edition of the Arcana published in 

 1722 (vol. ii. p. 40). 



2. (p. 2). ROBERT KOCH, Kreisphysicus in Wollstein, Die Aetiologie der Milzbrand- 



krankheit, begriindet auf die Entwickelungsgeschichte des Bacillus anthracis ; 

 1876. Beitrage z. Biol. der Pflanzen, herausgegeben von Ferdinand Cohn, 

 vol. ii. 



3. (p. 2). Of newer general works may be mentioned : FLUGGE, Die Mikroorganismen 



(Engl. transl. publd. by the Sydenham Society), 3rd ed. 1896. LEHMANN and 

 NEUMANN, Atlas and Outlines of Bacteriology, 1897. For the fermentation 

 organisms, LAFAR, Technische Mykologie, 1897 (English transl. 1898). Up to 

 the present only vol. i (Schizomycetes) has appeared (see note 126). 



Full references to bacteriological papers will be found in BAUMGARTEN'S 

 Jahresbericht iiber die Fortschritte in der Lehre von den Garungsorganismen, 

 and in the Centralblatt f. Bakteriologie. This appears in two sections : (i) medical 

 and hygienic bacteriology, and (2) general agricultural and technological 

 bacteriology, physiology of fermentation, and phytopathology. 



The literature of the French school will be found in MACK'S Traite pratique 

 de Bacteriologie, 2nd ed. 1891. 



4. (p. 2). LOFFLER, Vorlesungen iiber die geschichtliche Entwicklung der Lehre von den 



Bakterien. Part I, up to the year 1878 (all that has appeared), Leipzig 1887. 



5. (p. 4). A synopsis of researches on the structure of the bacterial cell and original 



observations will be found in BtJTSCHLl'S Weitere Ausfiihrungen iiber den Bau 

 der Cyanophyceen und Bakterien, Leipzig 1896, and in A. FISCHER'S Unter- 

 suchungen iiber den Bau der Cyanophyceen und Bakterien, Jena 1897. 



6. (p. 12). For the classification of the pigment bacteria here adopted see BEYERINCK, 



Die Lebensgeschichte einer Pigmentbakterie, Botanische Zeit. 1891 ; and also 

 SCHROETER, Ueber einige durch Bakterien gebildete Pigmcnte, Cohn's Beitrage 

 z. Biol. vol. i. 



7. (p. 12). Details as to the assimilation of these green bacteria (which are perhaps 



minute green algae, Protococcaceae) may be found in ENGELMANN, Zur Biologic 

 der Schizomyceten, Bot. Zeit. 1882. 



8. (p. 14). An acute discussion of the subject is given by NAEGELI, Ueber die Bewegung 



kleinster Kdrperchen, in Untersuch. ii. niedere Pilze, 882. See also Sitzungsb. 

 Munchener Akad., mathem.-phys. Klasse, 1879. 



