Ford's first Model T engine had four cylinders in a row. Some luxury cars of the 1920s had inline engines with as many as eight cylinders. Engines with as many as 12 or more cylinders in a row have been used, but mainly in large marine and stationary engines. Of course smooth running is only one goal.
In brief: Antibiotic eye drops. They start in hours but they may take 7-10 days to get rid of the bad bacteria. ...If you start antibiotics use them as directed, usually 7 days.. In brief: Antibiotic eye drops. They start in hours but they may take 7-10 days to get rid of the bad bacteria.
The standard dose of ofloxacin ophthalmic solution for treating bacterial conjunctivitis (commonly called  pink eye ) is one or two drops in the infected eye every two to four hours for two days, and then one or two drops four times a day for five more days. The dosage is usually the same in children and adults.