1908] BRIEFER ARTICLES 303 
Since my views hold good also for the animal body, it gave me great 
satisfaction when MEttTzeErR and AveErS published recently a series of 
wonderful experiments on the living animal, from which they inferred 
that “the continuation of the studies led up finally to the discovery that 
calcium is rather the strongest antagonist to the inhibitory effects of magne- 
sum.” ‘This is exactly what I have claimed for plants!—Oscar Loew, 
Munich, Germany. 
FORMATION OF ADVENTITIOUS ROOTS IN THE 
UMBRELLA CHINA TREE 
(WITH TWO FIGURES) 
A curious case of ‘‘self-eating”’ may occasionally be found in hollow 
and decaying trunks of the umbrella China tree (Melia Azedarach umbra- 
Hic. x Fic. 2 
ead @). During a heavy storm in July, 1908, several large trees of this 
ind Were blown down, the breaks occurring at the point w here the main 
I ‘Amer, Jour. Physiol. 21: 403. May 1908. Communication from the Rockefeller 
nstitute, Saige York. These brilliant iieeatiputions obscure all others made wit 
Such salts on animals. 
