Fermentations by Organisms 829 



B, clear, pale; on the surface, iridescent film, without organisms; 

 deposit of coloring matter. Very weak acid odor. 



Experiment CCCCXLVIII. June 26. Good Burgundy wine in a 

 flask taken to 15 atmospheres of superoxygenated air. 



July 21. Decompressed. Very pale color of Rancio wine. No longer 

 has any bouquet. No acidity; very weak, with a slight taste of boiled 

 wine. 



Experiment CCCCXLIX. July 21, 1874. Ordinary wine, in two 

 matrasses one quarter full. 



A, sowed mycoderms of wine; closed, sealed, at normal pressure. 



B, sowed similarly; the matrass is drawn out in the flame, and 

 taken to 15 superoxygenated atmospheres. 



July 30. A, covered with mycoderms. 



B, without mycoderms, but pale, with adherent deposit. Decom- 

 pressed, closed with a flame. 



January 18, 1875. A, very thick membrane on the surface; very 

 pronounced acetic odor; taste of vinegar. The acidity, measured by 

 soda and litmus, is 6 times stronger than in B. It turns the solution 

 of potassium bichromate green in sulphuric acid; therefore it still 

 contains alcohol. 



B, color very pale; very thin films on the surface and on the 

 walls of the vessel; definite winy odor, taste not very acid, an 

 extremely weak wine. Still contains alcohol. 



Experiment CCCCL. May 20. Wine in tubes, on the surface of 

 which mycoderms have been sown; 



A, in open air, covered with an inverted cone. 



B, at 21 atmospheres of an air with 81% of oxygen. 

 May 24. Decompressed. 



A, thick layer of mycoderms, liquid turbid. 



B, "faded", yellowish; precipitate of coloring matter; no myco- 

 derms; clear liquid. 



I boil wine in balloon flasks; during the boiling, I close each flask 

 with a stopper furnished with a long tube curved and drawn out, 

 through which the air enters slowly, cooling as it enters. 



When the liquid is cool, I open the flasks for an instant and throw 

 into one, A', the contents of tube A; into the other, B', the contents 

 of tube B. 



May 31. A', thick pellicles. 



B', no mycoderms. 



Experiment CCCCLI. May 28. Wine in a matrass; mycoderms 

 sowed on the surface; 



A, open air; 



B, at 23 superoxygenated atmospheres, which in the last days of 

 the compression, fall to 5. 



May 31. A is covered with a continuous film. 

 June 26. Decompression. 



A, thick layer of mycoderms; liquid very turbid. 



B, liquid very clear, with deposit of coloring matter; nothing on 

 the surface. 



