392 
Durmg his long residence in London he became thoroughly 
accustomed to English habits, and had the greatest admiration for 
English home life. His geniality and courtesy made him friends 
wherever he went. He made a journey to China in connection with 
his business, and returned with numerous specimens and much 
information regarding them. His business life ended in 1905, when 
he retired to Lancaster, chiefly on account of his wife’s health. 
Me kept up his interest in his old studies, as the following extract 
from a letter written by him from St. Raphael, to the writer 
of these notes in February, will show. He says: “ What a pity 
you_cannot run down to the Azure Coast. What fine things we 
would admire together. I would show you so many. ow now 
the entire coast from St. Tropeze to Vintimille (Italy), having 
done it all on foot at various times. e region of St. Raphael is 
the centre of the finest porphyric region of Europe, and the variety 
of rocks is immense, I have made a fine collection of them these 
last two years,” 
He devoted much of his time in his latest days to religious, social 
and philanthropic works. 
J. R. Jackson. 
Palo Amarillo (Huphorbia fulva, Stapf; syn. E. elastica, Alta- 
mirana and Rose, not of Jumelle).—Some particulars regarding this 
plant as a new source of rubber appeared in the Kew Bulletin, No. 7, 
1907, p. 294. The following supplementary information upon the 
subject is gathered from an illustrated article on “The Rubber 
Plants of Mexico” by Dr. H. H. Rusby in “Torreya” Vol. 9, 
No. 9, September 1909, 
From this paper it appears that the “Palo Amarillo” will not 
grow upon the alluvial i i 
hill-sides where the drainage is good. The bark is described as 
being thick and succulent at first smooth and of a light yellowish- 
The flowers appear in J anuary or thereabout, before the appear- 
ance of the new leaves, and the fruits mature in June and July. 
As soon as the bark is wounded, a milky juice exudes which is 
very +x and Sable of producing violent inflammation of the 
eyes if 1t enters them, as it is quite liable to do in spattering, when 
the tree is cut. : i... 
The great value of this tree as a rubber producer lies in its 
abundance over large areas and the proximity of the trees to one 
which it can be propagated and the rapidity of its growth. 
All that is necessary for propagation is to thrust the newly-cut 
branches into the soil, where they practically all grow. From them 
