ILLUSTRATIONS 



[Illustrations starred (*) are reproduced by permission of the Scientific Press 

 from Drs. Spitta and Slater's Atlas of Bacteriology.] 



PAGE 



VARIOUS FORMS OF BACTERIA 9 



SARCINA 10 



NORMAL AND PLEOMORPHIC FORMS OF TUBERCLE .... 13 



BACILLI, SHOWING FLAGELLA 15 



VARIOUS FORMS OF SPORE FORMATION AND FLAGELLA . . .18 



POTATO IN A Roux TUBE PREPARED FOR CULTIVATION ... 22 



STAPHYLOCOCCUS PYOGENES AUREUS INCUBATOR . . to face 22 



CULTURE MEDIA READY FOR INOCULATION 23 



INOCULATING NEEDLES 24 



PASTEUR'S LARGE INCUBATOR FOR CULTIVATION AT ROOM TEMPER- 

 ATURE to face 24 



METHOD OF PRODUCING HYDROGEN BY KIPP'S APPARATUS FOR CUL- 

 TIVATION OF ANAEROBES 27 



ANAEROBIC CULTURE . . . 28 



KOCH'S STEAM STERILISER 3 1 



LEVELLING APPARATUS FOR KOCH'S PLATE 40 



MOIST CHAMBER IN WHICH KOCH'S PLATES ARE INCUBATED . . 41 



HOT-AIR STERILISER .......... 42 



THE HANGING DROP 44 



DRYING STAGE FOR FIXING FILMS 45 



TYPES OF LIQUEFACTION OF GELATINE ...... 47 



WOLFHOGEL'S COUNTER 49 



PETRI'S DISH 50 



BERKEFELD FILTER 5 2 



APPARATUS FOR FILTERING WATER TO FACILITATE ITS BACTERIO- 

 LOGICAL EXAMINATION to face 52 



BACTERIA OF TYPHOID FEVER 56 



BACILLUS COLI COMMUNIS 60 



THE COMMA-SHAPED BACILLUS OF CHOLERA 66 



*BACILLUS TYPHOSUS to face 66 



*BACILLUS TYPHOSUS 66 



