17 



The L'Ueot of lieatini;' a inixtui'e nl' Icuji ainl watrr is tu lirin^ tliu matter into 

 su'.utiiin iiuicli iiicire i'a|ii;lly tliui at a lnw tcin|ieiatnR'. 



TABLK V]. .\CTI()X OF WaTKK AT HKillKK TKMPKHATUKES 

 UPON UlO ÜHAMS OF KÖJI. 



Exp. 



Tijiie ;iiilI 'l'e!iip"rutiiiv 



Culj. teilt, of 



water per 



lUO gl-. Ki-.ji 



Sijlid iinitter 

 dispolved 



Dextrose 

 jiereeiit. of 

 solid matter 



Specific rot. 

 power 



1 



2 liours iit rM° + IH his. at l.')°C. 



1700 



51.80 



08.0 



08° 



2 



J bum- at 4ö°C 



'JUdO 



SI. 80 



84.9 



70°. 1 



3 



2 hour.'! „ >. 1. 



20t)0 



01. r, 



08.5 



•53°. 5 



i 



i licmr at .jll° 



yOUU 



ST. 2 



00.0 



03°.2 



■J 



24hrs. at 15° + 2 lirs. at 100° 



KKMIO 



49.2 



.58. 



73°.8 



\Vith the exceiitimi o{ Exp. 2, tlie jierceiitase of matter dissolved tiy tlie 

 water is greater tliaii iu the experiments coiidiieted at a lower temperature, and 

 as a nde the percentage of dextrose in the solid matter is also greater. We shall, 

 however, learn something hy comparing experiments 2 and 3 with an experiment 

 made at the ordinary temperature with the same sam|)le of koji. In every 

 respect the conditions of the three experiments were the same excefit as regards 

 time and temperatme. 



TABLK VII. ACTION OK WATKR ON KÖJI. 



K.\p. 



Time and Te;e]ierature 



Cub. emit, of 



water jier 



lOJgr. koji 



2i»00 

 2000 



Solid iiiattor 

 dissolved 



Dextrose 

 per cent, of 

 solid matter 



till. 3 



,s4.'.l 

 O.-^.ö 



Specilie rot. 

 power 



1 

 2 

 8 



18 hrs. at 10-12° 



20.2 

 ■■>,]. K 

 01.0 



00°.3 

 TOM 

 53°.5 



j hr. at 45° 



2 lirs. at 4.'.° 



Till; above compari.son sliows that tlie amount of solid matter dissolved when 

 tiie contact lietween koji and water is for 18 hours at a low teniperatnre and lor 

 i hr. at ji high temperature is very nearly tlie same, hut the |ierceiitage of dex- 

 trose and the specitie rotatory power of tlie ^olution indicate that the piciportions 

 in which the three ingredieiits are present aie very dill'erent. If we assimie tiie 

 cpecitic rotatory power of the aliiuiiieiioids to be = — 4i)^ we may ascertain I he 

 eomposition of the solid matter, and referring it to a fixed amount ot' di'\(i<ise, 

 we )sy\ I'er 100 juirt« of di 



