Days of Hot Weather in Naples. Highs in the 80s Fahrenheit are common every month of the year here. And nearly every summer day at Naples reaches into the 90s F. But the thermometer normally stops short of 100 Â°F (38 Â°C). Days per month in Naples of at least 70, 80 or 90 Â°F.
The first steam locomotive was built by Richard Trevithick; it first ran on 21 February 1804, although it was some years before steam locomotive design became economically practical. The first commercial use of a steam locomotive was Salamanca on the narrow gauge Middleton Railway in Leeds in 1812.
The first railroad to operate with a steam locomotive was the Penydarren Tramroad at Penydarren Ironworks in Merthyr Tydfil, Wales. On February 21, 1804, a locomotive successfully pulled 10 tons of iron and 70 passengers at a maximum speed of 5mph over the 9-mile railroad.