Round the fountain.

Date:
1909
Catalogue details

Licence: In copyright

Credit: Round the fountain. Source: Wellcome Collection.

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    clusters, and are very thickly ^rollected around the fountain. A more developed growth of this bacillus is the B. housesurgeonensis or B. housephysicianicus. These are very interesting from a pathological point of view, as illustrating the progress of self-assertion. I find that these bacilli grow rapidly on a culture medium of firmness and respect, i—20. It is apt to grow too large for its surroundings, and has not the timidity of B. dresserius. It has a distinct reaction to sarcasm, and is of nocturnal habits. These bacilli are apt to conceal themselves on very slight provocation, and it is then tedious to unearth them. I now propose to bring to your notice the highest of these growths, the B. staffius. It is rarer than the foregoing, and is difl&cult to cultivate owing to its isolated and arrogant habits. It is rapid and erratic in its movements, and grows in an atmosphere of servility. There is one of these bacilli which is very amenable, and is large and slow in its movements. Another is very virulent, and has an acid reaction on the two inferior bacilli. This moves rapidly, and is dif&cult to observe. Others are short and blunt. I purpose, next, to demonstrate upon the Shecocci, with the varieties of this class. It is one of the most difficult to study owing to its elusive nature and un- certain habits. Its lowest or primary form is the Prococcus, which is difficult to grow except on a culture medium of pure kindness and tact. It is apt to set up local annoyance, but as a rule it is a rapidly moving creature. It is