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.
The first clinical application of the pacemaker took place in 1952 which involved the use of Zollâs pacemaker. It occurred following the admission of a 75- year old man in Boston Beth Israel Hospital with two episodes of Stokes Adams attacks and a complete heart block for the past two years.