d season
from seed. It must be reported, however, that a two-year-old graft of
this tree has not borne, as yet.

b. One thing of interest concerning the black walnut that has been
observed is the scarcity of the walnut web worm this season, none having
been observed by the writer up to September 1st. Is this a general or a
local condition?

The year of the Geneva convention, 1931, was the worst ever observed by
the writer in this respect. Do web worms occur in cycles, or do other
conditions govern their appearance?

c. The injury caused by the melting of grafting and coating waxes by the
hot sun is well known. Last spring an attempt was made to overcome the
difficulty by painting the waxed surface with aluminum bronze paint. The
experiment was a complete success, as even straight paraffine failed to
melt beneath the aluminum coating during the hottest summer here on
record. English walnut grafts so protected were more than usually
successful. Reflection of the sun's rays by the bright surface
undoubtedly lowered the temperature to below the melting point of the
paraffine. This lowered temperature was also doubtless beneficial to the
life processes of the graft union.

Direct coating of the trunks of newly set trees with the aluminum paint,
without the use of wax, was also tried with satisfactory results.
Applied direct to the dormant buds of the sweet cherry, however, it
proved toxic, as the buds never developed. This was no doubt due to the
bronzing liquid rather than to the aluminum.

The material is very easily applied, either with a brush or spray, and
makes a silvery, impervious and very durable coating. It should be
completely effective as a preventative of sun-burn of the bark of tender
species, especially to cover the creosote applications sometimes used by
tree surgeons. Such black coverings often defeat their purpose in the
hot sun by killing the living tissues by the absorption of the sun's
heat.

At the present time manufacturers are being corresponded with looking to
the development of a bronzing liquid that shall be non-toxic to buds.

Now if some investigator will come forward with a non-toxic, water
soluble coating material for the roots of nursery stock, Professor
Neilson's dream will be fully realized.

Last year Mr. Homer Jacobs of the Davey Tree Expert Company gave us a
very excellent report of his company's experiments with various coatings
used in connection with the moving of large trees