till' hrcwiii'^ priKORs iii .I;»ii'iii iIiIVci-k Uuxw Uvi-iiivwin;' iii Kiui>|it' .in I Aim-iifa. 

 wlicn^ f)io alcohiil i« frnnciitc«! for tlu* iiioM jmit from iiiiill<«c. 



Tlic followiiip: exix'riiiMiils will 8(.t\i' to illiinJratc ttie iircxliictioii of ilcxtrow 

 iiiul dextrin only. Tlic iiKnU- of ruco^-nisiii^ tin- iiiitnru of tlic prolncls i« the 

 ainic ill iirind|ilo iw tliiit iimd t« itlcntifv iniilto«-, viz. it loiiiimriwiii of tlic 

 (»l«enc«l uiK'tific rotiitorv |>o\ver with tlic iiiiinW«r pnlciilnt»-«! from tlio in'it-entn};«» 

 of siii,'ar ftiul tk'xtriii, nssiiinini; in llii* <;i«' tlic sn^^jir t" I«- «Icxtr«*- «itii i\ «iMTifn- 

 rotiitury |vo\ver | '/ 1, -" •'il) 



Kxpiiiiiitiit Ji>. J') >.'i:iiiiÄ <'l iliy «tjiiili f^cliitiiiizi'il ami '2<>^lrc. of a 

 solution of koji (|.ri'|Miiv<l from r^O^nnii!* in rxXjcc of watorl, iüIiiUmI t<»onu litn- 

 were lii'ati'd at 4()°C. for (! lioinv, tlii-ii alloweil to ^tllnll for 2 lioiira at I.V(' 

 Tho solution 'ontaiiit'«! in UMicr., (ilcdiictioii having W-vw niivlf for tlit- ko>i 

 cxtnvi) I '.'<i i;ram ul' soliil matter ami 1 <>>> (^raiii uIiu'-m-. with a rotation of 12 S 

 divlKions. 'J'his <^ivi-s 



Dextrose ... .H.") 7 \i\ irnt 



Dextrin . 14 .{ .. .. 



KKl.i) 

 Specilie rotntory jxiwer, ol»sorvetl = 7!*' 

 ,, . rnlcnliited = .SI 4 



Kxpeiiiiif.iit 11. 4 ^^r.ims ol ;;elati»iy.o«\ starch ami IK» (•(■ of koji Mtiiilion 



(JO '^ram.« nfkuji in .'»(X) e e. water) \MTe heatttl at 4.'» 11 for ;U lionr*. then 



ev;i|i ntotl to alxint "iiM) c.c. and diluted to •i.'K) e c Tlie coiniHihition of llio 



solid initter in mliition, after ditlmtinj; that due to the ki'ji extnu-t. \va- 



Dextios. SG.tX) 



Dextrin 14.W 



iLKJ.tX) 

 SiK-eifi ii>';itiirv [«.wer. ..liM-ivtil, = Sli*^.? 

 <ixleiilaUil, = M' 



In liolli f\)H'riinfnts. th'rcdrc. dixtrin ainl di'Xtniw are the only 

 pr'MliurtP. 



Ex|>criments wercni-xt dirert( d towards a.^ieitainin^ tlic dei;nH' of m|iidily with 

 which the coiiveision of slaii'li into dextrose took place nt dilTen-nl tein|¥'nitiiiifi 

 For this |)iir|)i>«! it w;is necessary to allow the mixture of «farch and koji solution 

 to react for Rome time, and to iu<<eerl»in the c<iiii|Hixition of the solution, or itn 

 specitic rotatory |K>\vur, at ilitVerent sta'^es. Setting out in one dirtvtioii the 

 diinktion of the digestion, and in a direction at right angles to tliiü tlie f>|C'ilic 

 rotatory power «"f the solution at staled iiiter\nls, the progre*» of tln' nction can 

 1« repri-sented hy a cin\etl line, using the S|)ecilic rotatory |io\\er am a imiisiirc 

 of the change which hsks <K-curi'ed in a given time. 



Tlio first scries of experiments was carried out it the teinpi-r.iture of the 

 air. whiih at I hat time varieil Utwi-en 4 and 10 C. 



