I was taking it 50 mg every six hours. But what has happened? I have missed the dose and I took two at once. I know that I should not do that and I don't know what I was thinking about while taking it but it has happened. I am afraid of overdose. How much of diphenhydramine is an overdose?
Quick Answer. The train was first invented and patented in 1784, by James Watt. The first working model to be made and successfully run was created in 1804 by Richard Trevithick. Continue Reading.
Steam propulsion and railroads developed separately, but it was not until railroads adopted the technology of steam that they began to flourish. By the 1870s, railroads had begun to supplant steamboats as the major transporter of both goods and passengers. A short biography of the father of steam navigation. Robert Fulton. Inventor Robert Fulton was born in Lancaster County, Pennsylvania, on November 14, 1765.