102 
MANNANE AS A RESERVE MATERIAL. 
needles soluble with difficulty in hot alcohol and melting at 
205°C. evidently phenylglucosazon. Therefore, there can be 
hardly any doubt that our sugar is mannose, and the white 
substance in the seeds a polyanhydride of mannose called man- 
nane. It is physiologically highly interesting to see that the 
seed stores up here in the form of an anhydride a sugar that 
is different from the sugars contained in the flesh of the fruit. 
