Gaar-Scott & Co., was an Americanthreshing machine and steamtraction engine builder based in Richmond, Indiana. The company built simple and compound engines in sizes from 10 to 40 horsepower. Farm machinery produced by the firm were advertised as part of "the Tiger Line" and used a tiger upon two globes as the company logo. It merged with the M. Rumley Co. in 1912 during a purchasing frenzy that put the later firm into insolvancy. The company was reorganized as Advance-Rumely Thresher Company Inc. It did build a few gas tractors as well. However, the name eventually died out.
The Abram Gaar House and Farm, is a favorite historic house in the state today. The Gaar-Scott office building, designed by noted architect John A. Hasecoster still stands in Richmond and is the headquarters of Richmond Baking, a large commercial baker.
Advance-Rumely Thresher Company was later purchased by Allis-Chalmers Mfg. Co.