"The number obtained by adding together the quantities of copper, tin, and lead exceeds that of the quantity of bronze taken in the second and sixth analysis. The increase is marked as excess, and is subtracted from the added numbers, so as to reduce their sum to 100. It should probably be deducted from the copper, which in the state of oxide is not easily deprived of the whole of the potass employed to precipitate it, and is liable, moreover, to retain a little moisture even when it appears quite dry. The presence, accordingly, of potass or water, or both, increases the apparent weight of the copper. As the excess, however, amounts in the one case only to 11/10,000th of the weight of the bronze analyzed, and in the other to 25/10,000th of it, it does not materially influence the result, whether as deducted from the entire alloy, or only from the copper." To this chemical evidence I am able, through the kindness of Mr. Bell of Dungannon, to add the following results of an analysis recently made for him by Professor Davy of portions of two leaf-shaped bronze swords found in Ireland:-- "No. 1.--_Very brittle._ Copper, 88.63 Tin, 8.54 Lead and Iron, 2.83 The lead and iron in this alloy are most likely impurities in copper and tin. No. 2.--_Much more malleable._ Copper, 83.50 Lead, 8.35 Tin, 5.15 Iron, 3.00 The iron in this alloy is probably an impurity in the other metals."