using a spray of two pounds of arsenate of lead to fifty gallons of 
water. Last summer I noticed a white woolly caterpillar that seemed 
to have done much damage. This was the larva of the Tussock moth. 
This species, one season, ate all the leaves of the beautiful Plane trees 
on Pennsylvania Avenue in Washingtoon. The white egg masses 
deposited by this moth must be removed in the winter or early spring 
from the crotches of the tree, and from the trunk near the ground. 
Then the leaf blight of the Plane tree, Gloeosporium nervisequam caused 
by late frosts and wet springs, will kill the terminal twigs, and new 
shoots have to develop from lateral buds a foot or two from the tips 
of the branches. This blight was severe in 1907, but not so injurious 
as after the cold, wet spring of last year. It evidently affects only 
untrimmed trees, as those I keep trimmed have not been injured by it. 
On my travels much of my time is spent in parks, and invariably Ober- 
Gartners, jardiniers, head-gardeners and sub-gardeners named Hans, 
Pierre, Andy or Mike become my friends. I asked one of them in 
Hyde Park why the Planes were so popular. He answered, " Because 
theyaresuch clean trees; they shed their bark,sodonot harbor insects." 
While it is considered one of its most valuable characteristics, this is, 
to me, the one unattractive feature of the tree. I do not fancy the 
mottled bark, or Uttered lawn at the season of shedding. It is a 
source of endless amusement in the summer to small boys and tiny 
maidens, on their daily chaperoned walk under my trees to and from 
the beach, to assist Nature by peeling off the loosened scales and 
patches. 
In Paris, in June, 1913, 1 was shocked when driving on the Champs 
Elysees to see the leaves of the Elm and Horse-chestnut trees dark 
and shriveled, and many of the branches absolutely bare. The effect 
was of late Autumn, until, beyond the Arc de Triomphe, the fresh 
beautiful green of the splendid Planes assured us that it was still 
Summer. I was interested on my return home to learn that Dr. 
Murrell of the New York Botanical Garden went abroad that summer 
to study these conditions, and found that drought, hot sun and tar 
dust had injured the Elms and Chestnuts while the Planes had escaped. 
Their leaves develop so late that they are not affected by early 
inclement Spring weather. 
That same Summer we motored from Vienna to London. Along 
the endless highways of Austria, Germany and France the Planes 
vied with Lombardy and Bolena Poplars, Lindens, Maples, Apple, 
Cherry and Pear trees, Hickory, and Acacia and sometimes were 
planted with them. There were more avenues of Planes in France 
than in Germany, and I noticed in the neighborhood of the larger 
