Another, more discreet, name for LSD that comes on a blotter/tab.
Gravely lawn tractors sorted by year. The Gravely Motor Plow Company was founded in 1916 in Dunbar, West Virginia building a successful line of two-wheel walking tractors. The company later moved to Charleston, North Carolina and, in 1964, Gravely entered the four-wheel garden tractor market. Gravelys used a unique rear-engine design on their tractors. Ariens purchased Gravely in 1982, and still owns the brand.
The invention of metals brought the availability of razors made of those (bronze, later steel) but it wasn't until the 17th century that straight razors were produced in Sheffield, England. The hollow ground construction required advanced metallurgy (crucible steel) and craftsmanship that was not previously available.