Tho’, what is here asserted, is grounded on several Years Experience, and confirmed by the Opinion and Testimony of Mr. _Philip Cooley_, Tanner, who from the Beginning hath been concerned in the several Tryals, and to whose Skill and Industry a Part of the Subsequent is owing. Yet to give the utmost Satisfaction, and as I think my self in the strongest Manner bound by the Encouragement, hitherto given me, by the _House of Commons_, to render the best Information I am able, in an Affair of some Consequence to the Public, I shall give a most faithful Account of the Progress that has been made, and the Success that hath attended this Way of Tanning with relation to the Goodness of the Leather, the Time, and Charge of Tanning, and other Circumstances; and shall add several Observations, with Directions for finding, and propagating these Roots, in great Plenty, that all Persons may be encouraged to carry this Method of Tanning, into a general Practice, which as it will be for their private Advantage, so it will not fail to promote the Public Benefit. In Order to this, I shall in the first Place beg Leave to place this Affair in the Light it appeared in before the _Committee_ of the _House of Commons_ of _Ireland_, to whom my Petition was referred by the _House_, in which Petition it was alledged, that I had established a Method of Tanning, without the Use of any Barks, to as great Perfection, cheaper, and in less Time, than with Bark, by Vegetables of our Natural Produce, and of easy Culture. The _Committee_, were pleased, for their greater Satisfaction, to summon a Great Number of Tanners, Curriers, Shoemakers, and others, to attend, to give their Testimony in relation to the several Specimens, and Proofs, that were to be laid before them. In respect to the Goodness of the Leather, so tanned, the following Specimens were exhibited. Nᵒ. 1. A Calve’s Skin from the Ooze. Nᵒ. 2. A Calve’s Skin, uncurryed. Nᵒ. 3. A Calve’s Skin, curried: each of these, when tann’d and dry’d, weighing about three Pounds. Nᵒ. 4. A Calve’s Skin, very strong and large, when tanned and dryed, weighing about Six Pounds. Nᵒ. 5. Seven or Eight Pair of Soles, of a Calve’s Skin, rais’d. Nᵒ. 6. A Bend of a Bullock’s Hyde for Harness. These were all proved by _Thomas Cooley_ and _Patrick Shale_ to be tanned without Bark, and with the Roots. Mr. _Henderson_, Master of the Tanners, said he was diffident of the Goodness of the Specimens, that he should have been thoroughly satisfyed: had he known, how the Leathers had proved, if worn, by some Porters, or Chairmen. That the Colour of Number 2, or 3, was not so good as some tanned with Bark, producing a Calve’s Skin curried, to compare with them, but did own, all the Specimens were thoroughly struck, and well tanned: That if they were in a Shop, intermixt with Skins, tanned by Bark, he could not distinguish them; and that, what tanned Numb. 5 and 6, would tann, Time and Quantity allowed, the thickest Bullock’s Hyde.