;4000 3000 BCE : Use of the wheel ( 3000 BC ), horseback riding, metal works ( copper, gold, silver, iron ) dishes, armor, daggers, knives, arrow tips.
12.
Her discovery of the tomb of Heqata was described as a small chamber, with two earthenware pots and containing a square coffin upon which were a bow and some arrow tips, as well as three walking sticks.
13.
History says some of the earliest biological weapons were used about 400 B . C ., when the Scythians, skilled archers who lived north of the Black Sea, dipped arrow tips in manure and the blood of decomposing bodies.
14.
The combination of the weapon's weight and the aforementioned pyramidal tip ( the design of which would be seen in the Medieval Era in the form of arrow tips ), allowed the pilum to be a formidable armour-piercing weapon.
15.
Early natives of North America placed a high value on the obsidian that came from this cliff as well as other similar obsidian deposits in the area because numerous tools could be fashioned from obsidian-most popularly knives, spear / arrow tips, and other sharp edged objects.
16.
Ibogaine-type alkaloids from the roots of genus " A . venenata " and the milky juice of the Namibian " Pachypodium " have reportedly been used as venom for arrow tips by the San people, though others have reported that " Pachypodium " do not produce such milk.
17.
A search of the house in the northern village of Apsalos uncovered 550 ancient objects _ including statues, pots, jewelry, arrow tips, helmets, and Stone Age weapons _ as well as 1, 718 gold, silver and bronze coins and more than 1, 000 fragments of ancient pottery, police said.
18.
Other modern tests described by Bane include those by Williams ( which concluded that longbows could " not " penetrate mail, but in Bane's view did not use a realistic arrow tip ), Robert Hardy's tests ( which achieved broadly similar results to Bane ), and a " Primitive Archer " test which demonstrated that a longbow "'could "'penetrate a plate armour breastplate.
19.
As the charged sector ( moving red square ) rotates to the position of the brush ( [ Y ] down arrow tip ) next to front disc ( [ B ] upper chain near center ), it induces a polarization of charge on the conducting shaft ( [ Y-Y1 ] upper horizontal black line ) holding the brush, attracting negative ( green ) charge to the near side ( [ Y ] upper square becoming green ), so that positive ( red ) charge accumulates on the far side ( across the disc, 180 degrees away ) ( [ Y1 ] upper square becoming red ).
