Allow me also to say, that since I have been engaged in these inquiries, I have most deeply felt the need of such an Industrial University,* endowed by Congress lands in each of the states of the , as is recommended in the report of the Granville Convention, a copy of which I sent you. They could be erected, and the nation would never feel it; while it would in a few years double the intelligence, wealth, power, and glory of each state, and the Union at large.

Our state, and I hope several others, will move soon. Can you not say a good word for us? Tour own Governor Hunt takes the right view of this matter, I am happy to perceive, as well as many other eminent men among your citizens.

I hope, and barely hope, that either some of the many remedies I have applied, or better, some change or peculiarity in the season, may check the career of this minute but pestilent destroyer, and save my trees yet a little longer; and when the scourge is once past, it probably may not return again for years to come. I notice, also, that trees once severely affected, last season, have not so many, if any eggs on them this year, which incites a hope that the same tree may not be visited but once in the course of its history, with a course of the disease, and that those which escape with life will stand triumphant, as the trees of olden time may have done before them.

I am suspicious, after all, that this is the same identical disease attributed to fungus by Mr. Knight, and others, for its phenomena are much the same; and I myself, settled down in the conclusion that this little flocculi on the bark, (the evident cause of the disease,) was a fungus, until I chanced to hear an egg crack under my knife, and examined with the microscope, and found it as above stated.

I shall call a witness or two if I can, to the facts stated above, as I desire that your readers should give to these statements more credit than is doe to a stogie interested witness, that they may be induced to an earnest and prompt examination, and report on the state of their own trees.

• Which we shall notice in our next. Ed.

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 apparent 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 diffused 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 your 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.

Tours truly, J. B. Turner.

I am able to add the testimony of my own eyes, to the above statement of facts, by Professor Turnir. I also concur with him in regarding these facts as revealing with a high degree of probability, the cause of the pear blight in its latest manifestations.

Samuel Adams, Prof. Chemistry, Ac, Illinois College.

Jaaksonville, April, 1852.

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 foil of the year, when quite too small, and the cold killed it.