In noticing above, that this solution is generally harmless, it is requisite that mention should be made of the few instances in which it has been observed to be injurious. I have applied it to many specimens of foreign and British insects, and commonly observed no indication of its having been used, when the creatures had become dry. But to confine our attentions to English specimens, when the solution is made stronger than recommended, it will, after a time, injure the fine yellow of the sulphur butterfly (papilio rhamni), by turning parts of it brown and dirty; but even in its reduced state it has a manifest effect upon the colors of two of our moths, the Dartford emerald (phalæna lucidata), and what is commonly called the green housewife moth (phalæna vernaria) changing their plumage, in several places, to a red buffy hue, when at the same time the beautiful green wings of the small oak-moth (phalæna viridana) are in no way altered by it. But notwithstanding these circumstances, it will, I apprehend, be considered as a very useful preservative, and save many specimens from destruction which other means usually fail of effecting. There are not many of our rural practices, that deserve more the disapprobation of the landed proprietor than that of pollarding trees.[74] “It is an evil under the sun, and common among men.” Here it is universal. This system of cutting off the heads of the young trees in the hedge-rows is resorted to by the farmer for the purpose of forcing them, thus deprived of their leaders, to throw out collateral shoots, serving for stakes for the fences, and for firewood. The purposes are effected; but of all hopes of timber, or profit to the proprietor, there is an end. No trees suffer more in this respect than the ash. Prohibitions against mangling trees, in agreements, are usual; but, with some exceptions in regard to oak, little attention seems paid to the covenant, as is obvious on the most cursory view of the country in any direction; whereas the ash is not a less valuable tree, from its thriving more universally in all situations, and becoming saleable in a shorter period. One or two generations must pass before an oak should be felled; but the ash becomes useful wood while its more respected companion is but a sapling. These prohibitions should not simply be engrossed on the parchment, but the agent ought strictly to notice any infringement; and young ash trees should be more especially guarded because they are the most likely to suffer, from their producing the greatest quantity of lop in the shortest time. The injury done by this practice to the present landlord and his successors is beyond estimation, as the numbers destroyed, and the vigor of their growth, must be first known; but there is not a farm of any extent from which hundreds of ash trees might not have been felled, had their growth been permitted, making an annual return; whereas nothing can be obtained now