with the positive pole of a battery sufficiently with water, and the picture left to dry. until the desired color appears. The galvanic current em- When completely dry it is further cleansed with nitro- ployed must not be too strong. The colors are more brilliant benzol. This chemical preparation… … AMBROSE’S AUTOMATIC FREIGHT CAR COUPLER. in strong nitric acid, and, after washing and drying, they ness, ee ee ee are coated with a rapidly drying alcohol varnish that has bolts, springs, etc., is required, it is inexpensive, and the Patents in the United States, breaking of a drawhead involves no…
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