An advertisement. To all concerned in the use of sheet-lead : demonstrating first, that cast-lead for covering of churches, houses, &c. is worse, and at least 50 per cent. dearer than mill'd-lead, supposing their price to be equal. This is proved from several trials purposely made, to find the greatest certainty and equality of the plumbers best casting to a thickness given, Secondly, that it is above 30 per ceut. [sic] dearer at the different rates they are commonly sold. This is proved from practice and experience in the use thereof, [...] coverings of both kinds finished, the measure and charge being compared together. As also a new challenge to all the enemies of lead sheathing, upon the Rising-Eagles return from her voyage to the East-Indies, having been one voyage before in the same sheathing to China.