2 3 2 



CAPE WINE-LEVURES. 



In case of GBi this amounts to 18.5% of its total loss. 

 „ ,, „ HeA3 „ „ „ 20.9% „ „ „ 



>> » )f ^ a ^-3 >> » J< ~3-~ /o » >5 i> }> 



„ „ „ HaB3 ,, „ ,, 24.7% „ „ „ „ 



v »> jj .rr)2 „ ,, ,, 25.I / „ ,, ,, „ 



(3) The main fermentation takes place during the first 

 eight or nine days. This is evident from the curves, and is fur- 

 ther proved by the following table : — 



Cul- 

 ture. 



Loss after 5 days. 



1-5 



PA1 

 GA2 



HeA3 26-8 



PB2 269 



GBI 17-6 



HaB3 28-6 



HaC3 28-8 



2-5 grs.=26-9% of total loss 



=8 6 

 =56-1 

 =56-3 

 =46-4 

 =59 

 =60-6 



Loss after 9 days. 



5-3 grs.=57 0% of total loss 



40 

 39-5 

 374 

 26 3 

 38 1 

 422 



=22-9 

 =82-6 

 =782 

 =69-4 

 =78-5 

 =88 8 



Since the fermentation has in most cases set in only 36-48 

 hours after inoculation, we see from the above, that the best and 

 most active levures, HeA3, PB2, HaB3 and HaC3, cause 56-60% 

 of the total loss during a fermentation of about 3-3^ days, and 

 78-89% of the total loss during a fermentation of about seven 

 days. 



3. Analytical Results. 



During the first week in January, 191 1, the contents of the 

 various flasks were analysed for alcohol. 



In the following table are given the results of these analyse-, 

 which were all done in duplicate, the results agreeing very 

 closely. For the sake of comparison the amounts of alcohol ( by 

 volume) that should have been formed according to the equation 

 QH.A = 2C0 2 + 2CH,,0, have been calculated out of the loss 

 of 100 ccm. contents of the flasks, i.e., ^ of the total loss, since 

 the flasks all contained 400 ccm. must, and the calculated values 

 placed opposite those found by analysis. 



It will be observed that in case of PA3, PA4 and GAi the 

 alcohol was not determined, since they are of no importance as 

 pure levures, and half of this class had been analysed. 



From the table on the next page we see : 



(1) That of the 13 proper wine-levures only HeAi, PBi 

 and GBi have formed under 15 volume per cent, alcohol. The 

 remaining to formed from 15.70-16.37 volume per cent. 



