How to Transfer Newspaper Prints to Glass.—­First coat the glass with dammar varnish, or else with Canada balsam, mixed with an equal volume of oil of turpentine, and let it dry until it is very sticky, which takes half a day or more.  The printed paper to be transferred should be well soaked in soft water, and carefully laid upon the prepared glass, after removing surplus water with blotting paper, and pressed upon it, so that no air bubbles or drops of water are seen underneath.  This should dry a whole day before it is touched; then with wetted fingers begin to rub off the paper at the back.  If this be skillfully done, almost the whole of the paper can be removed, leaving simply the ink upon the varnish.  When the paper has been removed, another coat of varnish will serve to make the whole more transparent.  This recipe is sold at from $3 to $5 by itinerants.

A Liquid Cement for Cementing Leather, that Will Not be Affected by the Action of Water.—­A good cement for splicing leather is gutta percha dissolved in carbon disulphide, until it is of the thickness of treacle; the parts to be cemented must first be well thinned down, then pour a small quantity of the cement on both ends, spreading it well so as to fill the pores of the leather; warm the parts over a fire for about half a minute, apply them quickly together, and hammer well.  The bottle containing the cement should be tightly corked, and kept in a cool place.

The Quickest and Best Way to Drill Holes for Water Pipes in Rough Plate Glass.—­Use a hardened (file temper) drill, with spirits of turpentine and camphor to make the drill bite.  A broken file in a breast brace will do good work if a power drill is not obtainable.

A Recipe for Making Printers’ Inks.—­For black ink:  Take of balsam of copaiba (pure), 9 ounces; lamp black, 3 ounces; indigo and Prussian blue, of each half an ounce; Indian red, 3/4 ounce; yellow soap (dry), 3 ounces; grind the mixture to an impalpable smoothness by means of a stone and muller.  Canada balsam may be substituted for balsam of copaiba where the smell of the latter is objectionable, but the ink then dries very quickly.  The red inks are similarly made by using such pigments as carmine, lakes, vermilion, chrome yellow, red lead, orange red, Indian red and Venetian red.

A Cement to Stick White Metal Tops on Glass Bottles.—­One of the best cap cements consists of resin, 5 ounces; beeswax, 1 ounce; red ocher or Venetian red in powder, 1 ounce.  Dry the earth thoroughly on a stove at a temperature above 212i Fah.  Melt the wax and resin together, and stir in the powder by degrees.  Stir until cold, lest the earthy matter settle to the bottom.

The Correct Meaning of the Tonnage of a Vessel.—­The law defines very carefully how the tonnage of different vessels shall be calculated.  An approximate rule for finding the gross tonnage is to multiply the length of keel between perpendiculars by the breadth of vessel and depth of hold, all in feet, and dividing the product by 100.  It is generally assumed that 40 cubic feet shall constitute a ton, and the tonnage of a vessel is considered to be the multiple of this ton, which most closely corresponds with the internal capacity of the vessel.