It will, therefore, be seen that a carpet made according to Fig. 1 will show five colors--three colors produced by the weft and two colors produced by the ingrain warp. Fig. 2 represents a carpet made with two-ply, in which case only four colors will be produced, two by the weft and two by the ingrain warp. It is, consequently, obvious that a carpet made in the manner above described will have a corresponding pattern or figure on both its sides, allowing it to be used on both sides. Fig. 3 also shows a two-ply carpet, but, in this case, six colors are produced, i.e., two colors by the weft and four by the ingrain warp, marked d, dč, e, and eč, the warp being so manipulated by the harness as to make the carpet reversible, and having a corresponding pattern or figure on both sides.--_Journal of Fabrics._ [Illustration: Fig. 1] [Illustration: Fig. 2] [Illustration: Fig. 3] * * * * * ARAEO-PICNOMETER. A modified araeometer has been recently patented by Aug. Eichhorn, in Dresden, Germany (Deutsches Reichs-Patent, No. 49,683), which will prove a great boon to chemists, distillers, physicians, etc., as it affords an easy means of determining the specific gravity of liquids, especially such of which only small quantities can be conveniently obtained. With the ordinary araeometers, as hitherto constructed, a considerable quantity of the test fluid is required, and an elaborate calculation necessary for each determination. In the new araeo-picnometer these drawbacks are ingeniously avoided, so that the specific gravity of any liquid can be quickly and easily obtained with astonishing accuracy. The new and important feature of this instrument consists in a glass bulb, c--see accompanying sketch--which is filled with the liquid whose gravity is to be determined. Thus, instead of floating the entire apparatus in the test fluid, only a very small quantity of the latter is required, an advantage which can hardly be overestimated, considering how difficult it is in many instances to procure the necessary supply. [Illustration] ^ = = = = a = = \ = / | = | |~~~~~~~~~~~~~~| | - - = - -| |- - = - | | - - = - -| |- - = - | | - / \ -| |- - | b | - | | \ / -| |- e//- -\\d | | - | c | -| |- \ _ / | | - \ / -| |- = - | | - = -| |- | | - | | - \f/ -| |- - v - | | -| / \ ------------------