Hairy cell leukemia (HCL) 1  Is a type of blood cancer that begins in the bone marrow. 2  Is a rare type of leukemia in adults.  Hairy cell leukemia gets its name from the short, thin projections that look like hair on its cells.
In 1799 Humphrey Davy discovered anesthetic properties of nitrous oxide (N20)---also known as laughing gas.. He had recently joined Thomas Beddoesâ Pneumatic Institution (established 1798) for treatment of disease by inhalation.
Mechanical Anemometer. Credited with devising the first mechanical anemometer is Italian art architect and mathematician Leon Batista Alberti, in 1450. In his device, the wind pushed against a disk, and an accompanying scale gave a relative strength of the wind as shown by the angle of inclination of the disk.up Anemometer. A more advanced anemometer design using four cups attached by spokes to a central rod was invented by John Thomas Romney Robinson in 1846. Robinson was the director of the Armagh Observatory in Ireland. With his design, cups caught the wind and spun around faster the stronger the wind velocity.