257 



i 



PSRIOD OP REAcnon ra uiinms. 

 5 10 15 20 25 30 35 40 45 50 65 \ 



PERIOD or RBAcnon iir unnrrta. 

 10 15 20 25 30 35 40 45 60 55 60 



Charts D 627 to D 634. — Velocity-Reddions of Starches of Calanthe vesiita var. rubro-oculata ( ), Calanthe 



regnieri ( -), and Calanthe bryan ( ). 



627. With Pyrogallio Acid. 630. Witli Nitric Acid, 



628. With Chloral Hydrate. 



629. With Chromic Acid. 



631. With Sulphuric Acid. 



632. With Hydrochloric Acid. 



633. With PotaBsium Hydroxide. 

 631. With Sodium Salicylate. 



17 



