readers should give to these statements more credit than is due to a single interested wit- 

 ness, that they may be induced to an earnest and prompt examination, and report on the 

 state of their own trees. 



The reason why apples recover from this poisonous influence so much more readily than 

 pears, is, I think, found in the nature of the trees themselves, as seen in the well known 

 habits and tendencies of the pear, toward what may be termed a mortification of tissues, 

 from any wound or puncture whatever, at certain seasons of the year. 



I had forgotten to mention that these little nests of eggs will be found much more ap- 

 parent immediately after a rain, or after wetting the tree, than before, especially on the 

 apple tree, where thousands will then be seen which escape the sharpest eyes when the 

 bark is dry. 



I would also suggest boring a slanting half-inch hole into the trunk of the tree, and 

 turning in half a tea spoonful of quicksilver, and stopping close with corks and wax, so 

 that the oxydised mineral may be slowly ditTused through the sap, as certain species of 

 insects are killed on trees in the "West India Islands. Other substances should be tried in 

 the same way. 



And I hope that 3'our readers will let us hear from successful experiments before the 

 ruin becomes complete all over the world; for that this pest will continue to spread by 

 every wind that blows, there is every reason to fear. It is, however, invariably most 

 abundant on my grounds, upon trees nearest to those most affected, and least cared for, 

 last season. 



These eggs, when viewed under a powerful solar microscope, appear to be of a cellular 

 texture, and from their little cavities, the bright sun-light reflects all the varied colors of 

 the rainbow. 



I find no larvae, as yet, on the peach tree — the color of the bark may prevent this, even 

 if they are there. But on the only two trees on my grounds affected by the yellows, I 

 find those little holes, or the evident traces of their work last year, which induces the 

 suspicion that the yellows in the peach may be caused by the same insect. 



Yours truly, J. B. Turner. 



I am able to add the testimony of my own eyes, to the above statement of facts, by Pro- 

 fessor Turner. I also concur with him in regarding these focts as revealing with a high 

 degree of probability, the cause of the pear blight in its latest manifestations. 



Samuel Adams, Prof. Chemistry, &c., Illinois College. 



Jacksonville, April 0, 1S52. 



P. S. I have never yet lost a single cherry tree since I commenced the habit of peeling 

 them, except one which I peeled in the fall of the year, when quite too small, and the cold 

 killed it. 



GREAT VARIETY OF NATIVE WOODS. 



BY AV. H. DENNING, PRESQUE ISLE, N. Y 



We were much impressed by a little incident in our neighborhood last summer — show- 

 ing, 1st, our wealth of forest trees, and 2d, how much more interest foreigners take in 

 them, than natives. A student in the School of Nimes, in Paris, wished to procure a 

 collection of samples of the different American woods — showing their structure, grain, &c 

 tleman in our neighborhood, owning a beautiful peninsula of 40 acres on the 

 Mr. Denning, undertook to procure them for him. Sixty species he found 



