Засоби особистої гігієни
Презентація по слайдам:
Before the advent of the refrigerator, food was kept fresh through the use of icehouses or iceboxes, most of which were built outdoors up against bodies of freshwater to keep cool.
In 1748, the first artificial form of refrigeration was born by one of the early refrigeration inventors, William Cullen at the University of Glasgow.
By 1911, the first home refrigerators were being manufactured by General Electric, selling for around $1,000 $ nearly twice as much as an automobile at the time.
Refrigerator and freezer units became more common at home during World War II, going into mass-production in the mid-1940s.
Around this time, Albert Einstein had designed his own form refrigerator (known only as "Einstein's Refrigerator")
Today, refrigerators have grown from more than a luxury and into a common necessity to every household. Technology has made the refrigerator both affordable to buy, but also energy-efficient, thanks to Energy Star standards.