The specific classification criteria for each health or. physical hazard class identified in the HCS enables manufacturers, importers, and others. performing hazard classification to collect and evaluate the available data to determine if the. chemical is hazardous and identify the associated level of severity.
Ancient Transportation. The first form of transport was, of course, Shanks pony (the human foot!). However people eventually learned to use animals for transport. Donkeys and horses were probably domesticated between 4,000 and 3,000 BC (obviously the exact date is not known).ncient Transportation. The first form of transport was, of course, Shanks pony (the human foot!). However people eventually learned to use animals for transport. Donkeys and horses were probably domesticated between 4,000 and 3,000 BC (obviously the exact date is not known).
Gravity Switchback Railway. What is considered the first successful commercial roller coaster made its debut in 1884 at New York's famous Coney Island. LaMarcus A. Thompson constructed the first roller coaster, the primitive Gravity Switchback Railway. The ride was an instant success, drawing long lines of eager riders and yielding returns at an astounding $600 a day. The idea of the gravity ride spread quickly, leading to great diversity in early roller coaster design.