378 



IIACTKRIA IN KKl.ATION TO PLANT DISEASES. 



Laii(iTn-sIi(k'^ — cnntimicil. 



(le\'clopmcnt of 146, 2or 



cxpo-iure of 146 



Larkspur, natural infection in 92. 130 



Laser, on action of Inxlrogen peroxide 214 



Lautensclilaser o\-en 100 



Lead acetate paper 62 



Lcg'uminosae. 



root-tuhercic hncilli of, fixation of nitrogen 



l.y '. .. 64 



]\'Ioorc's culture-medium for 197 



Lenses, 



achromatic, defects of 140 



apocliromatic, in photomicrograplix' 1,^9 



for bacteriological work 2,^ 



Lenses, photographic, 



Goerz 130 



Voigtlaender T,^o 



Zeiss Douhlc-Protar 130, 1.^2 



Zeiss Planar 1,^2 



Zeiss Protar 1,^2 



Zeiss LTnar 1,^2 



Lcnticels, natural infection through 92 



Lepesclikin, branched form described 218 



Leucin 63 



T^euconostoc mcsenterioides, isolation of 106 



Levin, bacteria rare in Arctic 25 t 



Levy, physical properties of enzxanes 6S 



Lewandowski, test for phenol 63 



Liborius, oxygen in depths of agar 230 



Li.ght, 



action on bacteria 7r, 243, 244 



bactericidal action ascribed to hydrogen 



peroxide 244 



germicidal action on dust greatest when 



moistened 244 



germicidal in liydrogen 244 



germicidal action in water 244 



Light filter for photoniicrograpby, 



dry 24 



Zettnow's 24, 201, 263 



Lilac blight 64 



Liquefaction in gelatin stab-cultures, 



characters to be noted 29 



interferences of various substances with. . . . 29 



Liquid air, effect of, on bacteria 79, 247 



temperature of 80 



Lister, dilution method for obtaining pure 



cultures 27, 22(1 



1 ,itmus-lactose-ag.ar ;•,},. 196 



Litmus milk, 



cultures in, observations nn 4(S 



preparation of 48, io'"> 



Litmus paper, for testing acidity 6t 



Litmus, reduction of, by b.acteri.a 62 



Lctel;), t\4)hoid l)acllb^^, l.)ranching loiaus in. ., 218 

 Loefflcr, 



alkaline methjlene blue 188 



extraction of enz) mes 68 



flagella-stam 190 



Loew, 



culture-medium for Uacillus prodigi(jsus. . . 239 

 enzxniic fermentation of tobacco 257 



Pa^p 



IjOndon, resistance to star\-ation 223 



Loops, platinum-iridium, for making transfers . 4^ 



Loquat. bacterial disease of 88 



Li'iwit's flagella-stain 192 



Luminous bacteria 60, 241 



cause of luminosity of 60 



culture-medium for 198 



Dubois' fluid medium for 242 



effect of chlorides on 60 



effect of magnesiiun sulfate on 60 



effect of manganese sulfate on 60 



effect of potassium iodide on 60 



effect of potassium nitrate on 60 



effect of potassium sulfate on 60 



in or near salt water 60 



in sand-fleas 60 



Molisch's work on 60 



on meat exposed in markets 60 



on s}'nthetic media 60 



spectrum of 242 



thermal relations of 60 



I^unt, stock-cultures of water-bacteria, how 



best kept 263 



Lysol, 



for sterilizing surface of diseased material. 74 

 germicidal action of 251 



^Liassen, 



branching forms produced at will by 23 



culture-fluid of 19S 



fruit-ether-forming liacteria 250 



reducing powers of bacteria 62, 243 



Mace, 



recuperation of pigmentation and pathogen- 

 icity 237 



ruled counting-plate 36 



Macfadx-en, 



effect of liquid air on bacteria 247 



thermophilic bacteria 248 



IMackensie's culture-fluid 198 



Magnesium chloride, effect on luminous bac- 

 teria 60 



Magnesium sulfate, effect on luminous bac- 

 teria 60 



Magnification, determination of 115 



Maize, 



artificial infection of 90 



cross-section of stem 4 



natural infection in 92 



Malachite green, use of 789, 222 



]\ralti>se-agar X'i 



Manganese sulfate, effect mi luminous bac- 

 teria 60 



?itarmier et .-Vbraham, germicidal action of 



ozone 252 



Alarpmann, 



" chromo-agars " for differcntialing 220 



germicidal action of sodium fluoride 233 



iron li.acleria 297 



Marsh g:is (11,209 



Maximum temper, Uiire, 



how determined 75 



range of S7 



M.a\cr's cultiire-lluid 197 



Ma/e, root-tuhcrcle bacleria 240 



