1 Calories Burned For Walking: 4.6 km/h (13 minutes per km). 2  Calories Burned For Walking: 4 km/h (15 minutes per km). 3  Calories Burned For Walking: 3.15 km/h (19 minutes per km).
The first true hypodermic syringe was created by Alexander Wood in 1853. He modified a regular syringe, which at that time was used for treating birthmarks, by adding a needle. He then used this new device for introducing morphine into the skin of patients who suffered from sleeping disorders.
He suggested radiosurgery for the treatment of deep-seated brain tumors. The first device for routine clinical use based on this idea was the prototype Gamma Knife constructed in 1967-68. Dr. Leksell treated the first acoustic neuroma with the technique in June 1969 at Karolinska Hospital in Stockholm, Sweden.