From birth to six months of age, a baby's normal breathing rate is 30 to 60 breaths per minute; after the age of six months, breathing typically slows to 24 to 30 breaths per minute.he opposite of apnea is tachypnea, or rapid breathing. A faster than normal respiratory rate may be caused by the flu or a cold in children, and pneumonia and asthma may also cause an increase in the rate of respiration in people of all ages.
CS gas is generally accepted as being non-lethal. It was discovered by two Americans, Ben Corson and Roger Stoughton, at Middlebury College in 1928, and the chemical's name is derived from the first letters of the scientists' surnames.
The carburetor was invented by an Italian, Luigi De Cristoforis, in 1876. A carburetor was developed by Enrico Bernardi at the University of Padua in 1882, for his Motrice Pia, the first petrol combustion engine (one cylinder, 121.6 cc) prototyped on 5 August 1882.A carburetor was among the early patents by Karl Benz as he developed internal combustion engines and their components.Early carburetors were the surface carburetor type, in which air is charged with fuel by being passed over the surface of gasoline.uch systems were originated by Carter Carburetor in the 1950s for the primary two Venturis of their four barrel carburetors, and step-up rods were widely used on most 1-, 2-, and 4-barrel Carter carburetors through the end of production in the 1980s.