The pictures you see on this page came mostly from Kijiji and eBay and are offered for sale 
on those sites. I have also added a few of my own collection.
Some of these tractors have been restored but many are shown just as they came
from the fields and were offer for sale. 
The names, models and years are shown as the owner said they were. 
The years of some of the pictures is not shown. It seems that the year didn't matter, it was the make and model that was the concern.
If anyone know the year of those tractors you might want to advise me of it so the page can be updated. 

These early tractors utilized wide metal tires, especially in the rear of the machine to disperse the weight. The front wheels often had ridges to help them steer in the dirt.  This was not the best way to obtain traction and it forced engineers to come to another form of wheels.  A continuous belt with slats were  fitted to the front and back wheels.  This style has been made famous by Caterpillar company and is still used in heavy earth moving equipment today. 
The Formosan was one of the first mass produced tractors starting in 1916.  It was a slow, heavy machine that ran on kerosene and could plow 8 acres on one tank of fuel. 
 Pneumatic tires from Firestone Tire and Rubber Company were introduced by In 1932 Allis-Chalmers. These tires had a much better grip in the soils.

J.I. Case's first pioneering efforts at producing a gas traction engine date to around 1894.
These early machine ran, but not well enough to be produced.

Charles W. Hart and Charles H. Parr began their pioneering work on gas engines in the late 1800s.
Hart-Parr is also credited with coining the word "tractor" for machines that had previously been called gas 
traction engines. The firm's first tractor, Hart-Parr No.1, was made in 1901.

In 1907 under the direction of chief engineer Joseph Galamb, Henry Ford produced his first experimental gasoline powered tractor. It was not called a "tractor" but rather a "automobile plow". The name tractor was not used until after 1910. The gasoline powered tractors were used extensively in farming.

The Frick Company was located in Waynesboro, Pennsylvania. George Frick started his business in 1853 and built steam engines into the 1940's. The Frick Company was also well known for sawmills and refrigeration units.