[147] In this dissertation, the time of the invention is stated to be about forty years before, which would be the year 1629 or 1630; but in an improved edition, printed with additions at Hamburg, in 1725, a different period is given. “About eighty years ago,” says the author, “a new kind of bellows, which ought rather to be called the pneumatic chests, was invented in the village of Schmalebuche, in the principality of Coburg, in Franconia. Two brothers, millers in that village, Martin and Nicholas Schelhorn, by means of some box made by them, the lid of which fitted very exactly, found out these chests, as I was told by one of their friends, a man worthy of credit. These chests are not of leather, but entirely of wood joined together with iron nails. In blacksmiths’ shops they are preferred to those constructed with leather, because they emit a stronger blast, as leather suffers the more subtile part of the air to escape through its pores.” [148] In many places these bellows were at first put in a wooden case, to prevent their construction from being known. [149] In J. P. Ludewig, Scriptores Rerum Episcopatus Bambergensis. Francof. 1718, fol. Where any bishop of latter times is praised, I find no mention of this useful and ingenious invention. COACHES. If by this name we are to understand every kind of covered carriage in which one can with convenience travel, there is no doubt that some of them were known to the ancients. The _arcera_, of which mention is made in the twelve tables, was a covered carriage used by sick and infirm persons[150]. It appears to have been employed earlier than the soft _lectica_, and by it to have been brought into disuse. A later invention is the _carpentum_, the form of which may be seen on antique coins, where it is represented as a two-wheeled car with an arched covering, and which was sometimes hung with costly cloth[151]. Still later were introduced the _carrucæ_, first mentioned by Pliny; but so little is known of them, that antiquaries are uncertain whether they had only one wheel, like our wheelbarrows, or, as is more probable, four wheels. This much, however, is known, that they were first-rate vehicles, ornamented with gold and precious stones, and that the Romans considered it as an honour to ride in those that were remarkably high[152]. In the Theodosian code the use of them is not only allowed to civil and military officers of the first rank, but commanded as a mark of their dignity[153].