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.
Steam locomotives were first developed in Great Britain during the early 19th century and dominated railway transport until the middle of the 20th century. From the early 1900s they were gradually superseded by electric and diesel locomotives. steam locomotive is normally controlled from the boiler 's backhead and the crew is usually protected from the elements by a cab. A crew of at least two people is normally required to operate a steam locomotive.