s per million appears to be adequate.
The softer the cuttings, the weaker should be the solution.

_Algae:_

In both the cold frame and the cold room the growth of algae is a
problem. The sand medium becomes crusted, with subsequent interference
with aeration. The algae sometimes creeps up the stems of cuttings,
coats the leaves, and covers terminal buds. Starting each season with
completely clean sand and equipment will not prevent the appearance of
algae over a long season of continuous operation. On August 20 of this
year the interior of the cold frame, including all of the plants, was
well dusted with tri-basic copper sulphate, according to manufacturer's
directions. To date no effect is noticeable either on the algae or on
the plants.

The various observations reported here should be verified by further
tests. They are offered merely as aids to anyone planning to experiment
with rooting chestnuts. When sufficient data and experience have been
gained, a complete Station circular will be published.

PRESIDENT BEST: If you have any questions, please save them until later.
It's been suggested that we hear from Dr. Jesse D. Diller next, and that
will give our good work horse, Dr. Crane, a chance to build up again for
us, because we are going to work him mighty hard.

DR. DILLER: I'd like to have the title of my paper changed to,
"Evaluating Chestnuts Grown Under Forest Conditions."

Evaluating Chestnuts Grown under Forest Conditions

JESSE D. DILLER, _Pathologist, Division of Forest Pathology, Bureau of
Plant Industry, Soils, and Agricultural Engineering, U. S. Department of
Agriculture, Beltsville, Maryland_

During the 49-year period since chestnut blight was first reported from
New York City, the U. S. Department of Agriculture has made more than
500 importations of chestnut seeds and scions, including nearly every
species of chestnut in the world, as well as some closely related
chinkapins and Castanopsis species. As early as 1909 the Department
initiated chestnut breeding work. It was known that few, if any, of the
chestnut, or related species, possess the timber-type characteristics of
our American chestnut. It was also known that, in general, the Asiatic
species show great natural resistance to the blight. But little, or
nothing, was known about their site requirements.

In 1927 the U. S. Division of Forest Pathology began breeding chestnuts
to produce timber-type trees. The chestnut breeding