WM 303-While I have no idea how many "fireless" locomotives still exist, I can supply you with a little information. The "fireless" locomotive was usually used in an industrial setting where steam was a product (or by-product) of the industrial operation. The fireless engine was basically a thermos bottle on wheels. Steam was taken from the industrial boiler and used to charge the engine. Then the locomotive could be used until pressure ran low, when it would be recharged again. Because the engine needed to be recharged on a regular basis while in use, they did not venture too far from the source of steam.
Fireless locomotives were built by Porter, Heisler and possibly a couple of others. The largest fireless locomotive ever built was an 0-8-0, currently on display at the Railroad Museum of Pennsylvania.
For more information, check out the following links:
From the Steamtown website, a history on Public Service Electric and Gas Company's number 6816 and more information on fireless locomotives.
http://www.cr.nps.gov/history/online_bo ... /shs2q.htm
From Northeast Railfan.Net, a photo gallery of fireless and compressed air locomotives:
http://www.northeast.railfan.net/steam21.html
Porter built conventional steam locomotives in a number of wheel arrangements as well.