primitive old farm & ranch flame sprayer weed & brush burner

Vintage old gas powered "flame thrower" for burning brush and weeds around the farm and ranch. This looks like it hooks up to a gas line and shoots a jet of flame out the end to burn weeds, grass and brush around the farm. It measures about 30" long overall, 10" long and 3 1/2" across the head. It has some rust and age.