a very colors, making dark lines appear white on a deep blue sur- efficient contrivance for scrubbing and mopping floors. It face. M. Pellet’s plan effects the opposite, as he obtains is self-acting, the operator having merely to propel it. It dark lines on a white ground, and the outline thus… … 40 minutes may be required. The short arm of a vertical rod striking electric light acts efficiently, and the against the shaft, G, as it reciprocatea exposure varies according to the dis- with the brush, and water from the phylloxera destroyer. The gas possesses remarkable powers tance and…
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