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 Temperature

to face [24]

Method of Producing Hydrogen by Kipp's Apparatus for Cultivationof Anaërobes

[27]

Anaërobic Culture

[28]

Koch's Steam Steriliser

[31]

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]

Wolfhügel's Counter

[49]

Petri's Dish

[50]

Berkefeld Filter

[52]

Apparatus for Filtering Water to Facilitate its BacteriologicalExamination

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

to"fac[66]

v*Bacillus Coli Communis

[66]

*Bacillus Mycoides

[66]

Pasteur-Chamberland Filter

[80]

Proteus Vulgaris

[86]

Bacillus Enteriditis Sporogenes

[86]

A Plan of Septic Tank and Filter-Beds

[91]

Filter-Beds

[94]

Miquel's Flask

[97]

Sedgwick's Sugar-Tube

[99]

Sedgwick's Tube

[100]

Saccharomyces Cerevisiæ

[117]

Ascospore Formation

[120]

Gypsum Block

[121]

Yeast

to face [122]

Ascospore Formation in Yeast

to"fac[122]

Nitrogen-Fixing Bacteria from Rootlet Nodules

to"fac[122]

*Bacillus of Tetanus

to"fac[122]

Saccharomyces Ellipsoideus

[126]

Saccharomyces Pastorianus

[126]

Bacillus Acidi Lactici

[131]

Bacillus Butyricus

[133]

Kipp's Apparatus

[140]

Fränkel's Tube

[141]

Buchner's Tube

[141]

A Method of Growing Cultivations in a Vacuum over PyrogallicSolution

[143]

Micrococcus from Soil

[151]

Nitrous Organism

to face [158]

Nitric Organism

to"face[158]

Nitrogen-Fixing Organism from Secretion of Root-Nodules

to"face[158]

Rootlet of Pea with Nodules

[163]

Nitrogen-Fixing Bacteria in Situ in Nodule on Rootlet ofa Pea

to face [164]

Nitrogen-Fixing Bacteria in Situ in Rootlet-Nodule of aPea

to"fac[164]

Nitrogen-Fixing Bacteria in Situ in Root-Nodule of a Pea

to"fac[164]

Bacillus of Tetanus

[170]

Bacillus of Symptomatic Anthrax

[172]

Bacillus of Malignant Œdema

[172]

A Centrifuge

[228]

Suspended Spinal Cord

[255]

Flask Used in the Preparation of the Toxin of Diphtheria

[262]

vi*Bacillus Tuberculosis

to face [280]

*Bacillus Tuberculosis

[280]

*Streptococcus Pyogenes

[280]

*Bacillus Anthracis

[280]

Flask Used in the Preparation of Tuberculin

[282]

Bacillus of Diphtheria

[289]

Types of Streptococcus

[298]

Micrococcus Tetragonus

[299]

Diplococcus of Neisser

[300]

Bacillus of Anthrax and Blood Corpuscles

[302]

Threads of Bacillus Anthracis, Showing Spores

[302]

Bacillus of Plague

[306]

*Bacillus of Plague

to face [310]

*Bacillus of Leprosy

to"fac[310]

Streptothrix Actinomyces

to"fac[310]

Bacillus Mallei

to"fac[310]

Diplococcus of Pneumonia

[312]

Bacillus of Influenza

[315]