Abstract Modern fake antique jade is a means of rapid aging to make its appearance similar to excavated ancient jade, which seriously disrupts the orderly devel opment of the collection market. This occurs because the current identifica tion method is still based on traditional ophthalmic identification, which re lies too much on the subjective consciousness of the appraiser. At present, scientific and technological testing and identification has become an impor tant part of cultural relics identification, and promoting the development of jade non-destructive scientific and technological identification can conti nuously improve the jade identification system. In view of this, we discussed the application methods and feasibility of nondestructive scientific and tech nological identification in the four aspects of traditional ophthalmic identifi cation: material identification, qualitative change characteristic identification, exogenous substance identification, and process trace identification. We found that non-destructive technology identification has broad prospects for development in the field of jade identification.

Abstract We propose that the Tri-Lobed Disc excavated from the Tomb of Prince Sabu (about 3000 BC, First Dynasty) was used in brewing beer as a mash rake to mix and even out the mixture of grains and hot water in a fairly big mash tun. Two observations which support this idea are presented in Section 1, and why the Disc works efficiently in mashing is explained in Section 2. We also pro pose in Section 3 our idea about how the Tri-Lobed Disc was made, and ac tually made its metal model to experiment and observe the flow around the Disc. About a would-be big “royal” mash tun of Prince Sabu is discussed in Section 4, and as a by-product of searching for any remains of ancient Egyp tian mash tuns, we uncover in Section 5 that the large basins at the Sun Tem ple of Nyuserre (about 2400 BC, Fifth Dynasty) were such remains for ritual beer brewing. This reinterpretation succeeds in explaining almost all of their functions.

Abstract As part of an important and unique engineering project to protect access to the only perennial source of water in Iron Age II Jerusalem, the engineers of the Israelite king Hezekiah (~715 - 686 BCE) excavated a 533-m-long-ubterranean water conduit. His reign took place during a time when the Assyrian empire was consolidating its control of Palestine and Syria, and the threat to the city’s only major water supply was acute and immediate. The aqueduct was constructed to transfer water from the Gihon spring, on the western flank of the Kidron Valley in NE Jerusalem, into the Siloam pool—a water reservoir built during the Middle Bronze II (MB II) Period and located inside the southeastern edge of the city. Hezekiah’s engineers were well aware that such a diversion of water from the northern spring source south into the Siloam pool would lower the water level not only in the immediate environs of the Gihon spring cave but also from the main reservoirs and water conduits. It would thereby threaten the water sources supplying the city’s religious and political heart. To deal with the problem a “device” to control water level in the new aqueduct and thereby also the spring environ was designed and eventually constructed about 71 m from the tunnel’s southern exit. This was where the tunnel ceiling rises rapidly from a height of ~2 m and reaches almost 6 m at the tunnel exit. Two parameters were decisive in the design and choice of this location 1) a threat to the city’s security and 2) the necessity to exercise control of the sluice system from without. Prior to tunnel inauguration four iron bolts > 8 cm in length and up to 1.2 cm wide, were hammered at about waist height through wood panels into which a wooden gate (the sluice) was fitted. A cable, probably woven of wool fiber, raised and lowered the gate. We retrieved and studied two of the four iron bolts and discovered that they are partially enveloped with accreted slivers of (apparently) cedar wood, now petrified to iron hydroxide. We have studied the bolts by SEM-EDS and XRD and were able to unravel a long history of oxidation of metallic iron during which the phases goethite, lepidocrocite, magnetite and lastly akaganeite crystallized—in that order. Collectively these species testify to corrosion of nails during a long history of a fluctuating, occasionally unique, chemical environment within the microcosm of the bolts and probably along the full length of the aqueduct. The external morphology of the bolts and the chemical composition of the metallic iron imply smelted low carbon wrought iron, hand-hammered into desired shapes. The ceiling above the nails is covered with plaster carrying organic matter and fragments of calcified organic fiber. Along nearby fracture zones pozzolanic mortar applications encircle hand-carved circular depressions, thereby collectively providing testimony to unique anthropogenic efforts invested specifically into this segment of the aqueduct.