influence of light of sufficient intensity, this H,CO, is re 
‘tinue the same process or produce the same re 
Ane The Botanical Gazette. _ [November, abe is 
duced, and a new compound of carbon is formed, of whose 
dehyde group, probably formic aldehyde, CH,0. The ex 
periments of Bokorny upon the nutrition of Spirogyra seem — 
to indicate the correctness of this idea. He endeavored to 
ascertain whether this plant could be supplied with any mem- 
bers of the aldehyde series in solution, and could then con 
sult as when it © 
was supplied with H,CO;. Several of the simpler members of | 
the aldehyde group proved deleterious, ” but direct experiments 
with methylal (C,H,O,) succeeded. This substance was SUp- 
plied to starved, and hence starch-free, Spirogyra filaments in 
pure water, and access of CO, was prevented. With these — 
conditions, under normal illumination, starch w, 
formed.* Not satisfied with this however, Bokorny suc 
lar conditions 
2) 
Lon } 
= 
— 
i=) 
sulphite, CH,O0+NaHSO,;. Boehm's experiments yar 
sugar® and, later, Arthur Meyer’s® with levules® net : 
galactose, mannite and glycerin, show that the ordinary # oe 
chyma cells of the green leaf can form starch from yee : 
of these substances supplied to starved (starch-free) : 
In view of these results, which do not stand a ont sugars! 
also supported by E. Fischer’s work onthe synthesis © m unds 
it can hardly. be doubted that complex carbon 
Jour. f. pract 
gentsc- 
ore und Boxorny: Chem.-physiol. Studien tiber Algen. 
Chem. xxxvi (1887), 272-291. ‘ .d. 
2 Boxorny: Ueber Shavketilduiig aus verschiedenen Stofie  t konnen 
bot. Gesells. vi (1888). 116-120. See also his hac ecryal ta 
Kohlensaure zur Starkebildung in griinen Pflanzen dienen 
XXXVI (1889}, 229-242. = 
aps DonENY: Ueber Starkebildung aus Formaldehyde. 
ells. rx (1891). 103. 3° 
5 Boru: Ueber Siackebildnng aus Zucker. Bot ei pa oe 
®Mever, A.: Bildung der Starkekrner in Gen eT 88, 1 fe 
ten, Mannit und Glycerin. Bot. Zeit. xLIV (1886). idon 
145-151.—Cf.' also LaureENT: Sur la formation d’amt 
orny. : 4. deutsch. &* 
ISCHER, E.: sop in der ZuckergrupPe Ber ubenzacker® 
Gesells. xxi (1890). 2114. See also: Synthese 
P. 779. 
= 
