=Tools.=--These are exhibited in Cases 45-46. The objects for the most part speak for themselves, but attention may be called to one or two of the most interesting. Such is the Roman bronze set-square (No. =482=; fig. 201), furnished with a base to enable it to stand. Its outer edges would be used by masons or carpenters to determine angles of 90° and 45° respectively. The inner angle of 90° would be useful for testing the true position of objects set at right angles to one another, such as the sides of a box, etc. The simplest type of set-square, that formed by two edges at right angles to one another, is seen in No. =483=. Notice the set of bronze plummets (No. =484=), which were suspended from strings. The one illustrated (fig. 201) has _Bassi_, "belonging to Bassus," inscribed on it in punctured letters. Two other inscribed tools are of interest. The one is the sickle-like iron blade from, perhaps, a gardener's knife, with the inscription, "Durra made me" (No. =485=), the other a finely made Greek bronze chisel, bearing the name of Apollodoros (No. =486=). [Illustration: FIG. 201.--ROMAN SET-SQUARE AND PLUMMET (NOS. 482, 484). 1:4.] =Building materials and Sculptures.=--Cases 45-48 contain objects illustrating the materials and methods of Greek and Roman builders and sculptors. There are several Greek tiles dated by the impression of a magistrate's name, _e.g._, "Under Aeschyliskos," "Under Apollodoros," the latter (No. =487=) bearing traces of the feet of a dog which has run across the tile before it was dry. The characteristic stamps on the Roman bricks of the Empire were impressed by wooden blocks in which the legend was engraved direct with a broad lettering, tending to exaggeration in the 3rd century and later. The beginning of the inscription is marked by a small raised circle, and the information given includes the name of the estate (often imperial) from which the clay comes, the name of the potter and his kiln, and sometimes the date by the consulship, though all these pieces of information do not necessarily occur on the same tile. As typical examples may be given: No. =488=, here illustrated (fig. 202), bearing the device of a pine-cone between two branches, and the inscription _ex fig(linis) M. Herenni Pollionis dol(iare) L. Sessi Successi_, "From the pottery of M. Herennius Pollio; baked by L. Sessus Successus"; and No. =489=, with the device of Victory, and the inscription: "Brick from the Publinian pottery (made with clay from) the estate of Aemilia Severa." A large number of the estates from which the clay came were, it should be noted, owned by women. [Illustration: FIG. 202.--ROMAN STAMPED TILE (NO. 488). Ca. 1:3.]