FIG. 25.—SWISS ALPINE POST IN WINTER.
FIG. 26.—SOLDIER POSTMAN OF THE EIGHTEENTH CENTURY.
He can also praise the noble thought of uniting the nations, which assumed its first tangible form in the world's mail. It will not be a sentimental song, but one full of power and indicative of our own time, in spite of those who scorn it.—Translated for the Scientific American Supplement by Jenny H. Beach, from Neue Illustrirte Zeitung.
ON NICKEL PLATING.
By THOMAS T.P. BRUCE WARREN.
The compound used principally for the electro-deposition of nickel is a double sulphate of nickel and ammonia. The silvery appearance of the deposit depends mainly on the purity of the salt as well as the anodes. The condition of the bath, as to age, temperature, and degree of saturation, position of anodes, strength of current, and other details of manipulation, which require care, cleanliness, and experience, such as may be met with in any intelligent workman fairly acquainted with his business, are easily acquired.
In the present paper I shall deal principally with the chemical department of this subject, and shall briefly introduce, where necessary, allusion to the mechanical and electrical details connected with the process. At a future time I shall be glad to enlarge upon this part of the subject, with a view of making the article complete.