The accompanying picture represents an illustration of an apparatus used in the Russian army for determining the ballistic qualities of military rifles. The test is usually made by crack-shot officers, who try every rifle separately, noting the result on a special printed graduated target. In such a manner the defects of every rifle are definitely ascertained, the ballistic inaccuracies and irregularities of deviation are defined, and the position of the movable sight is corrected. Each soldier, in receiving his rifle, is also supplied with the record of its peculiarities, printed on a paper tar get, which serves him as a guide in his rifle practice, and greatly increases his efficiency in the field. This apparatus was invented by Mr. Livchak, a Russian engineer. In the Russian army alone over 2,000 of these devices are now in use.— Translated from Russian- Han, the Univ.. Illust.