HYDROGEN SULPHIDE, ETC.; ACTION OF LIGHT ON BACTERIA. 



243 



('93)- PETRI, R. J., UND MAASSEN, ALBERT. Beitrage 

 zur Biologic der kranlcheitserregenden Bak- 

 tcricn ins besondcre iiber die Bildung von 

 Schwefelwasserstoff dtirch dieselben unter 

 vornehmlicher Berucksichtigung des Schwei- 

 nerothlaufs. Arbeiten aus dem Kaiserl. 

 Gesundlieitsamte, Bd. vm, 1893, pp. 318-356. 



M:my parasitic ami saprophytic forms have been tested. 

 All produce sulphuretted hydrogen when cultivated in 



cua |iwuwc viuiwumwu ujru&wgvzi wucu \.uiuvtucu in 



presence of suitable sulphur compounds, i. e. , such as are 

 loosely bound. The reduction of litmus and indigo in 

 solid cultures is ascribed to this gas. It is believed that 

 all bacteria are capable of producing it, and that the dis- 

 tinction into producers and non-producers of sulphur- 

 etted hydrogen must be abandoned. 



('93). PETRI, R. J., UND MAASSEN, ALBERT. Wekere 

 Beitrage zur Schwefelwasserstoffbildung 

 aerober Bakterien und kurze Angaben uber 

 Merkaptanbildung derselben. Arbeken aus 

 dem Kaiserlichen Gesundheitsamte, Bd. vin, 

 1893, pp. 490-506. 



('93). RUBNER, M. Ueber das Vorkommen von Mer- 

 captan. Arohiv. f. Hyg., 1893, Bd. xix, pp. 

 136-193. 



('94). WENZELL, W. T. A contribution to the 

 knowledge of bacteriologic chemistry. Jour. 

 Am. Med. Asso., 1894, vol. xxm, pp. 901- 

 003. 



('96). DUCLAUX, E. Stir les odeurs de putrefaction. 

 Revue critique Ann. de 1'Inst. Pasteur, T. 

 x, 1896, pp. 59 to 64. 



('97). MORRIS, MAX. Sttidien fiber die Produktion 

 von Schwefelwasserstoff, Indol und Merkap- 

 tan bei Bakterien. Aroh. f. Hyg., xxx Bd., 

 1897, PP. 304-3". 



Mercaptan was demonstrated by use of *' isatinschwe- 

 felsiiure," which is colored green by this substance. 



('02). BANNING, FRIEDRICH. Zur Kenntniss der Oxal- 

 saurebildung durch Bakterien. Centralb. f. 

 Bakt., Abt. 2, Bd. vm, 1902, pp. 520-525, pp. 

 556-567, mit i Taf. 



XXIX. Action of Light on Bacteria. 



('77). DOWNES AND BLUNT. Researches on the ef- 

 fect of light upon bacteria and other organ- 

 isms. Proc. Roy. Soc., vol. xxvi, No. 184, 

 1877, 6 Dec., pp. 488-500. London. 

 Downes and Blunt determined germicidal action to be 

 associated chiefly with the actinicraysof the spectrum. 



('78). DOWNES AND BLUNT. On the influence of 

 light upon protoplasm. Proc. Roy. Soc., vol. 

 xxvni, No. 191, 1878, 19 Dec., pp. 199-212. 

 ('78). TYNDALL, J. Note on the influence exercised 

 by light on organic infusions. Proc. Roy. 

 Soc., London, vol. xxvni, pp. 212-217. Na- 

 ture, vol. xix, 1879, p. 210. 



Negative results. Used flasks, and organisms grew 

 after exposure to sunlight. 



('81). TYNDALL, JOHN. On the arrestation of in- 

 fusorial life by solar light. Br. asso. for the 

 advancement of sci. Rep., 1881, pp. 450-451. 

 Nature, vol. xxiv, p. 466, 1881. 



Tyndall's results were due to the way in which he 

 experimented, i. e., with./fa*fc cultures. 



('82). ENGELMANN, TH. W. Bacterium photome- 

 tricum. Ein Beitrag zur vergleichenden 

 physiologie des Licht- und Farbensinnes. 

 Onderzoekingen gedaan in het Physiologisch 

 Laboratorium der Utrechtsche Hoogeschool, 

 Derde Reeks, vn, Aflev. n, 1882, pp. 252- 

 290, I plate. 



('84). DOWNES, A., AND BLUNT, T. P. The influence 

 of light on bacteria. Trans. Roy. Soc., Vic- 

 toria, vol. xx, pp. 1-2, 1884. 

 Reply to Jamieson. 



('85). DUCLAUX, E. Influence de la lutniere du soleil 



sur la vitalite des germes de microbes. C. 



R. des se. de 1'Acad. des sci. T. C., 1885, 



pp. 119-121. 

 ('85). DUCLAUX, E. Influence de la lumiere du soleil 



sur la vitalite des micrococcus. C. R. des 



se. de 1'Acad. des sci., Paris, T. ci, 1885, pp. 



395-397- 

 ('86). ARLOING, S. Influence de la lumiere blanche 



et de ses rayons constituants sur le devei- 



oppement et les proprietes du Bacillus an- 



thracis. Arch, de physiol. normale et pathol., 



1886, 3 sen, T. vn, pp. 209-235. 

 ('86). STRAUS, I. Note sur 1'action de la lumiere 



solaire sur les spores du Bacillus anthracis. 



C. R. des se. et mem. de la soc. de Biologic. 



Paris, 8 se., T. ill, 1886, pp. 473-474. 

 ('86). DOWNES, ARTHUR. On the action of sunlight 



on Micro-organisms with a demonstration 



of the influence of diffused light. Proceed- 

 ings of the R. Society, London, 1886, vol. 



XL, pp. 14-22. 

 ('87). DUCLAUX, E. Action de la lumiere sur les 



microbes. Ann. de 1'Inst. Pasteur, 1887, T. 



i, pp. 88-92. 

 ('87). Roux, E. De 1'action de la lumiere et de 1'air 



sur les spores de la bacteridie du charbon. 



Ann. de 1'Inst. Pasteur, T. i, 1887, pp. 445- 



452. 

 ('88). ENGELMANN, TH. W. Die Purpurbakterien 



und ihre Beziehungen zurn Liohte. Bot. 



Zeitung, 1888, Jahrgang XLVI, col. 661, 677, 



693, and 709. 

 ('88). ENGELMANN, TH. W. Ueber Bacteriopurpurin 



und seine physiologische Bedeutunjj. 



Pfliiger's Archiv., 1888, Bd. XLII, pp. 183-186. 

 ('89). RAUM, JOHANNES. Der gegenwartige Stand 



unserer Kenntnisse iiber den Einfluss des 



Lichtes auf Bacterien und auf den thier- 



ischen Organismus. Zeit. f. Hyg., Bd. vi, 



1889, pp. 312-368. 

 This paper contains a bibliography of 7 pages. 



('89). PANSINI, S. Dell'azione della luce solare sui 

 microorganismi. Reyista d'igiene practica 

 e sperimentale, Napoli, 1889, pp. 69-101. Re- 

 view in Ann. de Micr., 1890, p. 516. 



('90). SAVERIO. L'influenza della temperatura sull" 

 azione microbicida della luce. Ann. dell' 

 Inst. d'ig. di Roma. 

 Not seen. 



('90). JANOWSKI, TH. Zur Biologic der Typlius- 

 bacillen. Centralb. f. Bakt., vm Bd., 1890, 

 pp. 167-172, 193-199, 230-234, and 262-266. 

 Discusses the action of sunlight. 



('91). GEISLER, F. K. On the action of light on bac- 

 teria. (Russian.) Wratsch, 1891, No. 36, 

 PP. 793-797 

 Not seen. 



('92). MOMONT. See xxxv. 



('92). KOTLJAR, E. Zur Frage iiber den Einfluss des 



Lichtes auf Bakterien. Wratsch, 1892, Nos. 



39 and 40. Rev. in Centralb. f. Bakt., xn 



Bd., 1892, p. 836. Also in Ann. de 1'Inst. 



Pasteur, T. vn, 1893, p. 430. 



