During the evolution of tools over more than 2,000,000 years, using as principal materials, successively, stone, bronze, and iron, humans developed a number of particular tools.
LaTISHA PROPHETE stepped into the spotlight at Weequahic High School when the school's principal, Ronald G. Stone, her mentor and friend, died suddenly seven months ago.
The last year has been tough on Mr. White: His younger brother, Shahib, 29, who played football at Rutgers and was an assistant coach at Weequahic, committed suicide last summer, and the school's beloved principal, Ronald G. Stone, died of a heart attack last fall.
The principal deficiency of stone-throwing cannon was the enormous amount of skilled labour required to cut a sphere of stone accurately to a predetermined diameter.
Grain is the principal export, while feedstuffs, stone, cement and coal are among the chief imports.
This new, refaced principal façade (of Portland stone) was designed to be the backdrop to the Victoria Memorial, a large memorial statue of Queen Victoria, placed outside the main gates.
The sacks of raw wool, which were medieval England's principal export, weighed 26 stones, or 364 pounds; large standards, weighing 91 pounds, or one-fourth a sack, were employed in wool weighing.
