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The Trichine Tester was offered as a premium in the American Agriculturist in 1881. It's cost to subscribers was $1.50. Bausch & Lomb manufactured the device, calling it the Trichinoscope. It's frame was made of nickle plated brass and high quality optics were used. A large compression stage with sliding microscope allowed convenient viewing of the entire sample. Edward Bausch and Carl F. Lomb filed their patent for the trichinoscope on June 6, 1881. The patent was granted on Jan 3, 1882.
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