| Date | 1898 | 
| Author | Durham | 
| Contribution | b. Introduced tubes that could be placed inside test tubes to measure gas produced by bacteria. | 
| Reference | Anon. | 
| Notes | Reflects rapid increase in sophisticaton of bacteriology at close of 19th century. | 
| Category | Miscellany | 
| Pathogen Class | Bacteria | 
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