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.
Tank Development. Richard Edgeworth invented the Caterpillar track in 1770. In the Crimean War a small number of steam powered tractors based on this design proved very successful in the muddy terrain. The development of the modern tank remained dormant until the arrival of the internal combustion engine, patented by Gottlieb Daimler in 1885. In the United States the Holt Company built a tractor with caterpillar tracks that was used to move over difficult territory. Although it was suggested that this machine might be adapted for military use, those in positions of authority failed to see the significance of this new development.