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into mature trees, and then I hoped to get fruit and seed from 
them, which I could plant again and then watch the trees of the 
second generation to see how they behaved. But life is short, 
and I have not yet gotten the seed which I wanted to sow. 
I have, however, never had an opportunity of planting a tree 
in so light and bright a country as this and in such a company of 




e 
Fic. 3. Sweet-Gum Tree (Liqguidambar Styraciflua) Planted by 
?rof. de Vries. Photographed October 17, 1912. 
distinguished persons and of teachers of natural science, and I 
am very glad to have had this opportunity, through the kindness 
