I9I5] 



Arthur W. Thomas 



385 



the structure being the result wholly of hypothesis. The author 

 says that the Schema was intended to convey, only in a figurative 

 manner, the probable nature of the starch molecule. The f ormula 

 is based uponthe fact that starch must be a multiple of (C6Hio05)4, 

 these groups being arranged as f ollows : 



I 



HO 



(HC0H)3 



HCOH 



I 



HC 



tt 



O- 



h6 |oh 



^(HOOH) 



H 



OO^H 



r" 



I 



H2CO 



H 



HO 



(HCOH), 

 CH 



I 



CH 



^iCZS=^ 



^HÖjiHg 

 (HCOH), 



HgCO 



H 



(HCOH)o 



HCO 

 HC 



H 



HOCH 



-O- 

 -O- 



~>CH 



n 



W tri B 

 ' 2 o tq' 



n 



u 



w 



.w 





Fig. 2. Proposed structural f ormula for starch (Johnson). 



