The head of the femur articulates with the acetabulum in the pelvic bone forming the hip joint, while the distal part of the femur articulates with the tibia and patella forming the knee joint. By most measures the femur is the strongest bone in the body. The femur is also the longest bone in the body.
The first commercial cigarettes were made in 1865 by Washington Duke on his 300-acre farm in Raleigh, North Carolina. His hand-rolled cigarettes were sold to soldiers at the end of the Civil War. It was not until James Bonsack invented the cigarette-making machine in 1881 that cigarette smoking became widespread.