Democratic Sentinel, Volume 16, Number 52, Rensselaer, Jasper County, 13 January 1893 — SCIENCE AT HOME. [ARTICLE+ILLUSTRATION]

SCIENCE AT HOME.

Simple Experiments for the Family Cl role. Carve out of a raw potato a cylinder of the diameter of the upper portion of a lamp chimney of good size and about ah inch tall. Then with a quill toothpick pierce in this cylinder four cylindrical holes oblique with relation to the axis of the large cylinder. Our picture shows you the place and the direction of the holes. Then take the chimney and close the largest end with the potato thus prepared. At the top of the lamp chimney fit

on another potatoe cylinder, or a cork pierced with cylindrical holes like those below, and this time each hole must have each axis vertical and not oblique. Then through a vertical hole in the center, pass a string to suspend the apparatus. Catch the string below the cork by passing a match through it. Attach the upper end of the string to a nail in the ceiling, or to the chandelier which hangs above your center table. Meantime put a lamp shade over the glass chimney and force it down to the largest part: .then suspend all around the shade little horses and riders cul out of paper. Place a bowl on the table, directly under the lamp chimney, and porn water into it through the chimney’s upper end. This will set the apparatus in motion at once. The water passes through the holes in the cork at the upper end. fills the tube and runs out at the oblique orifices in the potato. The whole thing then begins to turn with great rapidity, and you have a hydraulic racing match before you. The little horses and riders will move around merrily. When you pull apart two panes ol glass which were stuck together by syrup or copying ink you will notice that the viscous liquid is spread out over each pane, so as to form very delicate and artistic aborrescences, like the impressions of fossil algte. You will he surprised at the number ol beautiful and graceful designs which you can obtain by this pressure of two panes together over any sticky substance. Our picture gives the facsimile of a design obtained with

printer’s ink. An impression can readily be taken from these design! on the glass, which may be varied a 1 will by moving the panes in various directions.

THE HYDRAULIC HORSE RACE.

THE IMITATION ALGAE.