Jacob Perkins

Jacob Perkins (9 July 1766 – 30 July 1849) was an American inventor, mechanical engineer and physicist. Continue reading

Palace of Westminster Had The First Patented Cooling System

Palace of Westminster, Houses of Parliament in London, England was the first building with a patented cooling system installed in 1834. Continue reading

First observation of a cell nucleus

The Scottish botanist Robert Brown made an observation of a cell nucleus in 1831, he noted the central body in the cells of the orchids of genuses Orchidaceae and Asclepiadaceae. He even called this structure the “nucleus” of the cell. Continue reading