20 



AI I In.N I , (P.N (AM'. SI I.AII. 



I?riiwii .iiiil Heron have slmwn that wlicn an iii|ii<'<iiih Kolittioti of mult in 

 iillnwcil til iciiiaiii iti fiiiituit with ii snliitinii of cani- iiiiiar. a rh.in<»c t.ikr» |ilai-<' 

 liy wJiicli tlir 01111' SI t'^ar is male to take up water ami is ihi-n-hy coiiNx-rti-il into 

 invert sn^nr. a inixtiin' nl' lU'xtrosi' ami l"ViiliMi\ Thn "«lia^tiw" «f malt in 

 said hy them to cxrrt its niixiinnin rlVci-l iip-'ti sii^-ir at .'»r>° f'.; it» action in 

 C'lDsiilcnihly ««»akeiird at CtlfC. ami ahnnst ilcstrnvi'il at (i(i''t' 



Kx|>L'riin«'nt slmws that tin- cxtrii't of' k'i')i alsn possi'sscs tin» |ir<i|H'rty nf" 

 «msinij canc-Rn<iar tu iM-i-dini' invcrti-il. hut I am not ahl« In ilffino tho limits of 

 its acfiiiti. Tlic two fnllnwin«; oxiM'riincnt.s will snOiif to pnivc this |ioint. 



K.rjicriineiit 1. I.!t74 gram «if dry t'jint'-sn>;ar was dissnlvcd in 2.') c. c. of 

 koji I'xtr.u-t. then diluted with water tn l<K(e r. The amniint nt" rotatinn was 

 fiiimd til Ik- I")S divisions, and the cjilcnlated iinmU-r irir». div 



1.II74 jrrm rune sn^ar dissolve«! in l()t)e.c. give rotation ■=z Vl.\ div. 

 2") CO kiiji solution dilnted to l(K) cc 3.4 „ 



After being allowed to stand I'or IS hours at alKiut I'Mo 12" (J. the rotation 

 was found t<i have diminished to i» div.. and the Rolntion contained I. (»7 fjnn. o( 

 <;lucos<'. iV-duetini; n.:?(i <;ram eont.iined in ^.'i e.c. of koji s<ilnlion. the amount, 

 formed from the CAne sugar wfus \'.\\ gram, eiinivalent to 1 244.") grin. ean<'-snpnr 

 and lience 0.7294 gram of unalteretl cane-sng:ir wa.i present We thus find the 

 cilculated nmnlier of divisions rot;ited hy tlie inverted 8<>lution to lie • f» 43 

 against "> div. actually ohwrved. 



TTnaltered cane sugar I().72'.I4 grni in liJi» c.c.l t- 4.4 div. 



Koji extract (2") c t; in 1<K) c c. of water) + 3.4 



Invert sngnr fonned — 2.37 „ 



f-alculated in degrees of arc tlie 8|M-cil)r rotatory jiowcr of the cane-sngar 

 his U-en reduced from 74' to 10^. 



Kv)v ri'}iieii> a. A solution of cam —u^rar conlnininn .'».41 iinims in I'XI c c., 

 ami giving a rotation in a 20 > m.m. tuln- of 33.1 div., cfjual I« |'/| . = 74", wiw 

 «mployed. 7") c.c of tlii< solution were nn'xe<l with 2.') c.c. of a solution of kö;i 

 whih containt'd in 1()0 c.c. 1 .4f) grin, of wdid matter. 1.012.'» grm. of (r|nco«>('. 

 and which cave in a 2<KI m m tuU- an optioil rotation of S divisionF. It may 

 lie remarked that from this and other ex|e imeiils made with the Mime solution 

 of koji, it wa-i found to Ik* exceptionally weak in its convertin-.; juiwer. The 

 oliwrvations are a« follow, after deilucting the eptjcal rotation «lue to the pn-dcn'e 

 of the koji solution :— 



