132 



Royal Society :- 



Gelatine solu- 

 tion not heated. 



There were 7 or 8 

 animalcules un- 

 der each field, 5 

 or 6 of which 

 were quite differ- 

 ent to any thing 

 observed in the 

 other fluids.They 

 had long thin bo- 

 dies, swimming 

 with a peristaltic 

 motion. 1 or 2 

 ordinary swim- 

 ming vibrios 

 were also pre- 

 sent ; but the 

 small black vi- 

 brios were ab- 

 sent. 



Gelatine solu- 

 tion heated for 

 half an hour 

 at 100° Fahr. 



Life seemed to 

 have only slight- 

 ly decreased, and 

 none of the ani- 

 malcules were 

 swimming. The 

 peculiar animal- 

 cule mentioned 

 in the first co- 

 lumn appeared 

 to retain still its 

 peristaltic mo- 

 tion, but not suf- 

 ficient power to 

 move across the 

 field, a few ordi- 

 nary vibrios be- 

 ing also observed 

 moving to and 

 fro. 



Heated for half 

 an hour at 

 212° Fahr. 



A very decided 

 diminution in 

 the quantity of 

 life present was 

 noticeable. 



Heated for half 

 an hour at 

 300° Falir. 



No life present. 



Heated for half 

 an hour at 

 400° Fahr. 



No life present. 



Putrid- Meat Fluid. — Water was placed in an open vessel, and a 

 piece of meat suspended in it until it became putrid and contami- 

 nated with myriads of animalcules. This fluid was placed in the 

 usual tubes, which were sealed on the 7th of November, and heated 

 on the same day. 



The contents of the tubes were subjected to examination on the 

 1st of December, or twenty-four days after having been heated. 



Not heated. 



A large quan- 

 tity of life was 

 present, name- 

 ly, microzyma 

 and several di- 

 stinct species of 

 vibrios, among 

 which were a 

 number of the 

 small black ones 

 frequently men- 

 tioned. 



Heated for 



half an hour at 



100° F. 



This tempera- 

 ture had but 

 slightly affected 

 the life present, 

 the animalcules 

 being as nume- 

 rous as in the 

 liquid not heat- 

 ed, and moving 

 as usual. How- 

 ever, one spe- 

 cies of very 

 long vibrios ap- 

 peared to be 

 considerably af- 

 fected, as they 

 weremuchmore 

 languid in their 

 movements. 



Heated for 



half an hour at 



212° F. 



This liquor dif- 

 fered from all 

 the others in 

 being turbid 

 and coagulated. 

 Life was still 

 present; and al- 

 though heat had 

 deprived the 

 animalcules of 

 the power of lo- 

 comotion, still 

 they retained 

 a sufficient a- 

 mount of vital 

 force to place 

 it beyond a 

 doubt that life 

 was not de- 

 stroyed. 



Heated for 



half an hour f 



300° F. 



The liquid was 

 quite clear, the 

 albumen(which 

 is coagulated at 

 200°) appear- 

 ing to be redis- 

 solved. A large 

 quantity of the 

 life in the fluid 

 was destroyed, 

 but some vi- 

 brios still re- 

 mained-, the 

 small black ones 

 being the most 

 numerous. 



Heated for 



half an hour 



at 400° F. 



Heated for 



half an hour 



at 600° F. 



All life 

 had dis- 

 appeared. 



All life 

 had dis- 

 appeared. 



