154 
PROTECTING WALL-TREES. 
is reasonably supposed that, tlie vapours thus assumed, are not de¬ 
composed ; but in other instances, the atmosphere brightens, the ba¬ 
rometer rises, and the weather becomes settled. This state of things 
leads to the consideration of 
3. The Phenomena of Atmospheric pressure. 
But here I must conclude, for I have so far extended my limits 
that, I postpone the consideration of the interesting facts which re¬ 
main to be adduced, till I again address your readers in my fourth 
chemical article. 
January 11 th, 1834. 
ARTICLE II.—PROTECTING WALL-TREES. 
• BY J. A. 
The following method, communicated by a friend of mine, appears 
likely to effect the object he has in view. I only regret the idea was 
not furnished a post or two earlier, for insertion in your March num¬ 
ber, as the very early developement of blossom this season will ren¬ 
der every precaution for its protection necessary. Procure a net of 
light material, and about three inches in the mesh, sufficiently large 
to cover the whole front of the tree; and having well strewed the 
floor of some still place with feathers, those of game or pigeons, which 
are generally destroyed, would be excellent, pass a stout pack thread 
all round through the outside meshes of your net, and with an as¬ 
sistant at each corner, immerse it in a kettle of boiling pitch, and 
when properly soaked and still hot, let each one step quickly to his 
appointed corner, and simultaneously drop the net upon the fea¬ 
thers, which will be taken up. The net so fledged may be immedi¬ 
ately suspended where its services are desirable, by any method the 
operator chooses. 
The experiment not having had a season’s trial, the distance must 
also be left to the choice of those who are pleased to adopt the plan. 
Tazely, February 26th , 1834. 
P. S. Wool, hair, or down, might be substituted, but perhaps 
without much advantage. 
