H4 



BACTERIA IN RELATION TO PLANT DISEASES. 



('92). ChmElEwsky. Zur Frage iiber die Wirkung 

 des Sonnen- und elektrischen Lichtes auf 

 die Eiterbakterien. Wratscli, 1892, No. 20. 

 Reviewed in Centralb. f. Bakt., Bd. xii, pp. 

 174-175. 1892. 

 ('92). GeislER, ThEodor. Ziir Frage iiber die Wir- 

 kung des Lichtes auf Bakterien. Centralb. 

 f. Balvt., XI Bd., 1892, pp. 161-173. 

 (92). BuchnEr, H. Ueber den Einfluss des Lichtes 

 auf Bakterien. Centralb. f. Bakt., xi Bd., 

 1892, pp. 781-783. 

 Deals with question of effect of li,£rlit ou b.'icteria sus- 

 peuded in water "The result of all these e.xperinients 

 points to the cODclusion that light exerts a poAverfu! dis- 

 infecting influence upon the named bacterial sorts when 

 these are suspended in water." The experiments were 

 made on typhoid bacilli, B. eoli communis, B. pyocyan- 

 eus, cholera vibrios, and various bacteria of decay. 



('92). BucHNER, H. Ueber den Einfluss des Lichtes 

 auf Bakterien. 11 Mitth. Centralb. f. Bakt., 

 Bd. XII. 1892. Ideft 7-8, pp. 217-219, I fig. 



Author obtained bacterial letters and figures on agar 

 and gelatin plates by covering a part and exposing to 

 sunshine. I,ight passed through ivater still possesses 

 active bactericidal powers, 



(■93). BucHNER, H. Ueber den Einfluss des Lichtes 

 auf Bakterien und iiber die Selbstreinigung 

 der Flusse. Arch. f. Hyg., Bd. xvii, 1893, 

 pp. 179-204. 

 ('93). Richardson, Arthur. The action of light in 

 preventing putrefactive decomposition ; and 

 in the formation of hydrogen peroxide in 

 organic liquids. Jour. Clieni. Soc, Trans- 

 aotions, London, 1893, vol. exiii, pp. 1,109- 

 1,130. 

 ('94). d'Arcy, R. F., and Hardy, W. B. Note on 

 the oxidizing powers of different regions of 

 the spectrum in relation to the bactericidal 

 action of liight and air. Jour, of Physiol., 

 i894-'9S, vol. XVII, pp. ,^90-303. 

 ('04). \V.\RP, H. M.^RSIIALL. The Action of light on 

 bacteria. Pliil. Trans Royal Soc, Lond., 

 vol. 1S5 (1894), pp. 961-9S6. Also a sepa- 

 rate. 4to., 25 pp , I plate. See also Revue 

 Sci., 1894. 

 (94). Fischer, Bermit-\rd. Die Bakterien des 

 Meeres naoli den Untcrsuclnmgen der Plank- 

 toncxpedition unter gleichzeitiger Beriick- 

 sichtigung einiger iilterer und neuerer Un- 

 tersuclumgen Centralb. f. Bakt , Bd. xv, 

 1804, pp 657-fir/i 

 Shows that sunlight tends to reduce uuinl>er of bacteria 

 in upper layers of the sea There are always more bac- 

 teria in npi>er layer^^ of the sea at sunrise than in the 

 afternoon There are also in the daytime a great many 

 more at a dei>th of 10 meters than near the -.urface. The 

 depth to which the bactericidal action of the sunlight 

 ix'uetrates rlepeuds on its inlensity. duration of action , 

 clearness of the water, etc. It probably reaches down 

 several meters. Cultures of various water bacteri.a were 

 killed in ;i short time when exijosed to the midday sun in 

 August, the snu's rays being first i:)assed through one-half 

 meter of sea water. 



(94). 1 iTEi'iKiNNE, A. Beitriige zur Bcurteihmg der 

 Einwirkung des Ij'ohtes auf Bakterien. 

 Arbciiten a. d. Kaiser!. Gesundlieitsamte, Bd, 

 IX, 1804. Heft 2, pp 40S-4I3- Rev. in Cen- 

 tralb. "f Bakt , xvii Bd . 1895, pp 646-647. 



The red end of the spectrum (between the lines I) and 

 R) lias no injurious effect. In the green {between lines 

 K -and F) there is a distinct inliibitiug ru-tion. In the 

 blue-violet and ultra-violet tlie bactericid.al action is niosl 

 marked. The action of the light is di rietU' on the bac- 

 teria, na<.leria inoculated in ]ilates alreadv exposed to 

 the light grew jusi as well .as in the control plates I.iglit, 

 which has had the heat rays remo^a-d b\' filtr.'ition 

 through alum solution, possesses the same g^imicidal 

 action. 



('94). DiEuDONNE, A. Ueber die Bedeutung des 

 Wasserstoff^superoxyds ftir die bakterien- 

 todtende Kraft des Lichtes. Arbeiten aus 

 dem kais. Gesundheits-Amt., Bd. ix, 1894, 

 pp. S37-540- 



Ascribes bactericidal effect of light in great part to the 

 formation of hydrogen peroxide in tlie culture-medium. 



('94). EngElmann. See xix. 



('94). d'Arsonval and Charri.x. See xxxiii. 



('96). Beck, M., u. Schultz, P. Ueber die Ein- 

 wirkung sogen. monochromatischen I^ichtes 

 auf die Bacterienentwicklung. Zeitschr. f. 

 Hyg , Bd, xxiii, 1896, pp. 490-496. 



('99). Kedzior, LaurEnz. LTeber den Einfluss des 

 Sonnenliohtes auf Bakterien. Arch. f. Hyg,, 

 Bd XXXVI, 1899. pp 323-334, Rev, in Cen- 

 tralb, f. Bakt,, Bd, xxvii, 1900, pp, 203 and 

 759. 



Snulight also destroys in an atmosphere of Inalrogen, 

 although less activeh', 



Coi), Simoncini, G, B., E Viola, D. L'influenze 



deH'innafhaniento sul contcnuto battericn 



delle polveri di strada, Ann. d'igiene sper,, 



Roma, vol. xi, 1901, pp. 373-392, 



Bibliog, of 21 titles. The bactericidal action of light 



■was greater on the moistened dust of the street than on 



the dry dust. 



('91 V 



('91). 

 ro3). 



XXX. Effect of Electricity. 



Spilkek. AV,, und Gottstein, ."-V, Lleber die 

 A^ernichtung von Mikroorganisnien durcli 



die Induktionselektricitat, Centralb, f, 

 Bakt, IX Bd,, 1891, pp 77-88. 

 Fermi, Clat.tiio, LTeber die Reinigung der 

 Abw.-isser durch Elektricitiit, Arch, fiir 

 Hyg., Bd. XIII, 1891, pp. 207-22R, 

 KruECER. S, Ueber den Einfluss des constan- 

 ten elektrischen Stromes auf Waclisthum 

 der Bakterien, Zeitschr, f, klin med,, Bd, 

 XXII, 1893, pp. 191-207 

 Kruegcr's conclusions are : The inhibition or destruc- 

 tion of the bacteria is due to the liberation of ions in the 

 fluid, 



('93), BuRCi, E,, E Fr.\,scani. V. Contributo alio 

 studio dell'azione b.atlerieida della corrente 

 continua, — .'Vtti della Soc. Tosc, di Scienze 

 nat, Pisa. Mem., vol, xii, 1893, pp, 99-119. 



('94), d'Arsonval .\nd Charrin, Sec xxxiii, 



{'96), FriEdEnTH-\l, LT. Uelicr den Einfluss des 

 elektrischen Stromes auf Bakterien. Krit- 

 isehes Referat, Centralb, f, Bakt,, xi.x Bd,, 

 1896, pp, 319-324, 



('96). Gottstein, A, L'eber den Einfluss des elek- 

 trischen Stromes auf Bakterien. Centralb, 

 _ f, Bakt,, XIX Bd., 1S96, pp 602-605, 



('96), FriEdENT1I.\l. H. Ueber den Einfluss des 

 Indnktionsclektrizit.'it auf Bakterien, Krit- 

 isches Referat, Centralb, f, Bakt,, xx Bd,, 

 1S96, pp, 505-508, 



('96) l\f\RMii:R, h. A, I^es loxincs et releelrieito 

 .'\nn, de I'lnst, Pasleiir, T, x, 1806, pp, 469- 

 480, 



('09). ThielE. Hermann, und Wolf, Kurt. Ueber 

 die Einwirkung des elektrischen Stromes 

 auf Bakterien Centralb. f Bakt.. xxv Bd , 

 1890, pp. 650-655, ,wilh I fig. 



Results all neg.'itive. 



Con) Kr.\usE. See xv. 



