Builder's photo of Green River Lumber Company steam locomotive number 1, a geared, two-truck Heisler, parked at the Erie, Pennsylvania factory, in 1926. Photo by Heisler Company, J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, geared locomotive.

Builder photo of Construction Number 1498 showing right side of Greenleaf Lumber Company 50 Ton, Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, February 1924. This locomotive was used for logging near Greenleaf, Washington. Photograph by Schauble.

Builder photo of Construction Number 1458 showing right side of Greenwood Logging Company 63 Ton, Two Truck Heisler Geared Steam Locomotive Number 5 at Erie, Pennsylvania, July 1922. This locomotive was used for logging near Aberdeen, Washington. Photograph by Schauble.

Builder photo of Construction Number 1491 showing right side of Greenwood Logging Company 80 Ton, Three Truck Heisler Geared Steam Locomotive Number 7 at Erie, Pennsylvania, February 1923. This locomotive was used for logging near Aberdeen, Washington. Photograph by Schauble.

Builder photo of Construction Number 1283 showing right side of Grogan Manufacturing Company 36 Ton Two Truck Heisler Geared Steam Locomotive Number 3 "Sybil" at Erie, Pennsylvania, May 1913. This locomotive was used for logging near Gladstell, Texas. Photograph by Schauble.

Builder photo of Construction Number 1389 showing right side of Gulledge Lumber Company 40 Ton, Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania, April 1919. This locomotive was used for logging near Mendenhall, Mississippi. Photograph by Schauble.

Builder photo of Construction Number 1169 showing right side of G.W. Sims Company 20 Ton Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania in September 1909. This locomotive was used in logging near Darling, Mississippi. Photograph by Schauble.

Builder photo of Construction Number 1227 showing right side of H.A. Holmes 20 Ton Two Truck Heisler Geared Steam Locomotive Number 5 at Erie, Pennsylvania, April 1911. It is not known where this locomotive was used or for what purpose. Photograph by Schauble.

Builder photo of Construction Number 1192 showing right side of Hackley, Phelps, Bonnell Company 50 Ton Two Truck Heisler Geared Steam Locomotive Number 6 at Erie, Pennsylvania, February 1910. This locomotive was used in logging near Hackley, Wisconsin. Photograph by Schauble.

Builders photo showing right side of Haddock Mining Company 48 inch gauge, 32 Ton, Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, 1930. This locomotive was used for mining coal near Silver Brook, Pennsylvania. Photograph by Schauble.

Builder photo of Construction Number 1262 showing right side of Hall and Legan Lumber Company 36 Ton Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania, August 1912. This locomotive was used for logging near Morton, Mississippi. Photograph by Schauble.

Builder photo of Construction Number 1228 showing right side of Hall-Leftwich Lumber Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 3 at Erie, Pennsylvania, June 1911. This locomotive was used for logging near Morristown, Alabama. Photograph by Schauble.

Builder photo of Construction Number 1256 showing right side of Hall-Leftwich Lumber Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 4 at Erie, Pennsylvania, July 1912. This locomotive was used for logging near Morristown, Alabama. Photograph by Schauble.

Builders photo of Construction Number 47 showing left side of Hammermill Paper Company 95 ton, Heisler 0-8-0 Fireless Steam Locomotive Number 4 at Erie, Pennsylvania, 1939. This locomotive was used in the paper mill at Erie. Photograph by Schauble.

Photo of Construction Number 47 showing right side of Hammermill Paper Company 95 ton, Heisler 0-8-0 Fireless Steam Locomotive Number 4 with four flatcars of pulpwood at the Hammermill plant at Erie, Pennsylvania, circa 1939. Photograph by Schauble.

Builder photo of Construction Number 1517 showing right side of Harleigh-Brookwood Coal Company 36 Ton, Two Truck Heisler Geared Steam Locomotive Number 64 at Erie, Pennsylvania, March 1925. This locomotive was used for mining coal near Frackville, Pennsylvania. Photograph by Schauble.

Builder photo of right side of Construction Number 1472 showing Hattiesburg Saw Mill Company 63 Ton, Two Truck Heisler Geared Steam Locomotive Number 5 at Erie, Pennsylvania, January 1923.This locomotive was used for logging near Hattiesburg, Mississippi. Photograph by Schauble.

Builder photo of Construction Number 1518 showing right side of 36 inch gauge Hawley-McIsaac Coal Company 32 Ton, Two Truck Heisler Geared Steam Locomotive Number 15 at Erie, Pennsylvania, March 1925. This locomotive was used for mining coal near Madisonville, Kentucky. Photograph by Schauble.

Builder photo of Construction Number 1303 showing right side of 36 inch gauge H.C. Johnson Company 23 Ton Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania, June 1914. This locomotive was used for logging near Johns Wood, Michigan. Photograph by Schauble.

Photo showing the air brake distributing valve and related piping ahead of the cab on the right side of a Heisler geared locomotive at Erie, Pennsylvania. Photograph by Schauble.

Photo taken from the right side of a locomotive boiler for a Heisler geared locomotive at Erie, Pennsylvania. Photograph by Schauble.

Photo taken from the rear of the firebox of a locomotive boiler for a Heisler geared locomotive at Erie, Pennsylvania. Photograph by Schauble.

Photo of the cab interior of a Heisler geared locomotive at Erie, Pennsylvania. Photograph by Schauble.

Photo of the cab interior of a Heisler geared locomotive showing the johnson bar and air brake valves at Erie, Pennsylvania. Photograph by Schauble.

Photo looking at the end of a Heisler geared locomotive center truck used on three truck locomotives with bolster in place and frame bolster sitting on top at Erie, Pennsylvania. Photograph by Schauble.

Photo looking at the end of a Heisler geared locomotive center truck used on three truck locomotives with gear case covers and bolster removed at Erie, Pennsylvania. Photograph by Schauble.

Photo looking down on a Heisler geared locomotive center truck used on three truck locomotives with gear covers and bolster removed at Erie, Pennsylvania. Photograph by Schauble.

Photo looking down on a Heisler geared locomotive center truck used on three truck locomotives with gear covers removed at Erie, Pennsylvania. Photograph by Schauble.

Photo looking down on a Heisler geared locomotive center truck used on three truck locomotives with gear covers and bolster removed at Erie, Pennsylvania. Photograph by Schauble.

Photo looking at the underside of a Heisler geared locomotive center truck used on three truck locomotives at Erie, Pennsylvania. Photograph by Schauble.