I 



/ 



G. 



THE BEGINNINGS OF LIFE. 



9 



^e be 



Is who 



en 



se 



)se 



into 



will 



contain, 

 in such 



k 



strong infusions frequently changed^ whilst weak ones 

 might be preserved; and that even a strong infusion 

 might be prevented from undergoing change^ if the 

 period of ebullition were sufficiently prolonged. Prof. 

 Cantoni also found that Vihlones were plentifully pro- 



^^ duced within such flasks when 



very strong 



organic 



t> niSj ill £^^^g were employed^ and when the daily temperature 



^ons are usui of the air was not less than yfF 



1 



res of the ti 



The fluids most frequently employed by M. Pasteur 



howeverj ti were yeast-water, yeast- water sweetened by sugar, urine, 

 he preservat infusion of beet-root, and infusion of pear. 

 ses — quite k Taking urine as a fair example of such a fluid, I 



or other nil: have found that the statements of M. Pasteur and of 



,ins. 



Any t Prof. Lister are perfectly correct. This 



fluid 



may 



rcrest doubts generally remain for an indefinite period in such 



vessels without becoming turbid, or undergoing any 



Victor Meuni; apparent change. The same is generally found to be 



] fter havi' ^^^ ^^^^ '^^^^ ^^ infusion of turnip j and occasionally 



V ^[: an infusion of hay may be similarly prevented from 



undergoing fermentation. On the other hand, if the 

 turnip-solution be neutralized by the addition of a little 

 ammonic carbonate, or liquor potassse^ or^ better still, 

 if even half a grain of new cheese be added to the 



becai 



)eedily 

 d other org^ 



tained 



1 



cer 



tl 



^ After speaking of the vital resistance to heat of Vibriones, he says 



h a little nitr^*^; (* q^^ j^^^j^ ItaUana-Lombardia,' serie vi. torn. I. 1868) :— 'The tempe- 



c reinain^^ rature at which the production of Vibriones ceases in an organic solution 



f ox-g^^^' varies with the quality of the organic matter dissolved in it, with the 



ted, tli^,, quantity of air enclosed in the flasks together with the solution, and also 



erimen 



,f Bacterid 



m 



* 



(and more notably) with the temperature of the air in which the flasks 



^^ r'^j-ine, ^^'^' ^^^ ^^P^ ^^^^^ l^^^^g heated.' 



