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Weed Killer
Stephen Snow Sears developed his invention, a chemical
spray, on his farm near Nanton, Alberta. In the patent record, he claims
his invention easily eliminates many harmful or pesky plants, especially
Sow and Canada thistle, without causing damage to the environment. The
three main ingredients are sodium chlorate, calcium chloride and potassium
bi-chromate. The directions instruct one to dilute the solution with
water, and apply it by a sprayer or sprinkler. The roots of the plant then
absorb the chemical without any injurious effects to the soil or human
population.
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