156 KePORI S.A.A. AUVAN'CEMEXI OF SCIENCE. 



Flask (a) containing the sound wine is passed in the same way 

 through funnel (M). 



By slightly turnitig taps (R, r) the capillary tips are broken off, 

 and the liquids fall into the porcelain filters, and through them in 

 A'essels (Y, y). 



After a few moments, tap (P) is open, and the liquid adjusted 

 to the zero of the graduation on tube (S). 



The required quantity of this liquid is then introduced into 

 bottle (T) by blowing carefully through tube (W) and watching the 

 graduation. 



Tap (p) of the second part of the apparatus is then open, and 

 bottle (T) filled with sound sterlized wine up to the mark (i litre). 

 The bottle is then separated from the apparatus by fusing the con- 

 strictions (V, v) with the blow-pipe. The bottle is left in that state 

 for a few days. 



RESULTS. 



From repeated experiments with this apparatus the following 

 conclusions were arrived at : — 



r. All sterilized wines mixed with sterilized broken wine break 

 after a few days. 



2. For a same wine, breakage is proportionate to the quantity 

 of broken wine mixed with it up to a certain limit. 



3. For a same quantity of broken wine introduced into a given 

 quantity of sound wine breakage is in inverse proportion to the 

 intensity of the colour. 



It is evident that if the Black matter is the result of a chemical 

 reaction between certain components of the wine, by mixing broken 

 wine with sound wine, we introduce into the sound wine, elements 

 capable of increasing the proportion of black matter. After four or 

 five days, when the mixture had acquired all the characteristics of 

 broken wine, the quantity of black matter in bottle (T) was measured 

 and found in every case to be equal to that introduced with the 

 broken wine. Hence we conclude : — - 



1. The black matter is not the result of a chemical reaction. 



2. The break is due to this black matter. 



3. The black matter is not formed at the expense of the colouring 

 matter, but acts on it. 



HOW DUES THE BLACK MATTER ACT ON THE 

 COLOURING MATTER? 



Wme contains three kinds of colouring matter. 



1. Red matter known under the name of Rhodoganeine. 



2. Blue matter known under the name of Cyanoganeine. 



3. Yellow matter known under the name of Pheoganeine. 



It is the blending of these three matters in various proportion? 

 which gives the wine its " robe.' 



