132 



Royal Society :- 



I Gelatine solu- 

 Gclatine sola- ! tion heated for 

 tion not heated. \ half an hour 

 at 100° Fahr. 



There were 7 or 8 

 animalcules un- 

 der each field, 5 

 or of wiiich 

 were quite differ- 

 ent to any thing 

 observed in the 

 other fluids.They 

 Imd 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. 



Heated for half 

 an hour at 

 212'^ Fahr. 



Heated for half 

 an hour at 

 300^ Fahr. 



Life seemed to A very decided ^ No life present, 

 have only slight- I diminution :' 

 ly decreased, and [ the quantity of 

 none of the ani- life present was 



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. 



noticeable. 



Heated for lialf 

 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. Tliis 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 e.\amination on the 

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



Not heated. 



Heated for 



half an hour at 



100° F. 



A large quan- 

 tity of life was 

 present, name- 

 ly, microzynia 

 and several di- 

 stinct species of 

 vibrios, among 

 whicii were a 

 number of the 

 small black ones 

 frequently men- 

 tioned. 



This tempera- 

 ture had but 

 slightly aflected 

 the life present, 

 the animalcules 

 being as nume- 

 rous as in the 

 liquid not heat- 

 ed, and moviTig 

 as usual. How- 

 ever, one spe- 

 cies of very 

 long vibrios ap- 

 peared to be 

 considerably at'- 

 fect<xl, as tiiey 

 were much m<ire 

 languid in their 

 movements. 



Heated for 



half an hour at 



212° F. 



This liquor dif- 

 fered from all 

 the others in 

 being turbid 

 andcoagulated. 

 Life was still 

 present; andal- 

 tliough heat had 

 deprived the 

 animalcules of 

 the power of lo- 

 comotion, still 

 they retained 

 a suflleient a- 

 mount of vital 

 force to place 

 it beyond a 

 doubt that life 

 was not de- 

 stroyed. 



Heated for | Heatetl for Heated for 

 half an hour at half an hour half an hour 

 300° F. at 400' F. i at 500° F. 



The liquid was 

 quite clear, the 

 !ilbumen( which 

 is coagulated at 

 2lK>°j^ appear- 

 ing to be redis- 

 solved. A large 

 quantity of the 

 life in the fluid 

 Wiis destroyed, 

 but some vi- 

 brios still re- 

 mained, the 

 small black ones 

 being tlie most 

 numerous. 



All life 

 had dis- 

 appeared. 



All life 

 had dis- 

 a)ipcared. 



