180 BOTANICAL GAZETTE 
sawdust. It was found that any other sawdust at hand would not 
give straight roots with several of the species. When the seed- 
lings had attained a suitable length, they were removed from 
sawdust, fastened to bars of white pine, and the bar was then 
suspended with the roots immersed in filtered tap-water. The 
method of fastening the seedlings 
to the wooden bar is so simple 
and so preferable to the common 
practice of pinning, that it may 
be worth while to illustrate it with 
fig. 1, and to detail it here. A 
bar of wood differing in diameter 
Fic. 1.—Seedlings of Raphanus he: 
sativus, oo the method of fast- according | to the size of the 
ening to wood with blotting lings used <6 clamped in 
= oo — Two strips of heavy blotting 
are cut the same length and width of the wooden bar. 
_ these two strips are dipped in water, and then : 
a covering the other, on the .upper side of the wooden } 
_a rubber band is slipped on over one end of wood 
ting paper. The upper strip of blotting paper is raise’ 
fingers of one hand, while with those of the other 
_ inserted between the two strips of paper and deposit 
_ tothe rubber band. The upper strip of paper is 
- hae the other, another rubber band slipped on ~ 
rubber bands, one on each side. 
' again raised, another seedling inserted, and so ont 
full. 
: “The great advantage of this method of euspendig 
is seen in its avoidance of all trouble from Sachs’s 
= The ‘epicotyl or hypocotyl is left free to carry - 
without changing the direction of the root. © The sime 
rapidity of preparation commend this method for V 
of experimentation besides rheotropism. For see! 
foots are to be immersed in water, the blotting 
— Arbeit. Bot. Inst. Wiirz, < — 
