. Inductive elementary physical science with inexpensive apparatus, and without laboratory equipment . ERIMENTS. Auxiliary 1. This apparatus is more easily made tin tube than Avith a lamp chimney. Obtain a tube ofany size or length; a piece of speak-ing-tube about 12 inches long Millanswer. Cork the lower end, andstick it in a hole bored in a blockof wood. The latter serves as astand. With an awl, or a sharp nail,punch three holes equally distantfrom each other, as in the illustra-tion. Enlarge them Mith a rat-tailfile, twisting it, and pushing the edgeof the tin inwards, so as to make
. Inductive elementary physical science with inexpensive apparatus, and without laboratory equipment . ERIMENTS. Auxiliary 1. This apparatus is more easily made tin tube than Avith a lamp chimney. Obtain a tube ofany size or length; a piece of speak-ing-tube about 12 inches long Millanswer. Cork the lower end, andstick it in a hole bored in a blockof wood. The latter serves as astand. With an awl, or a sharp nail,punch three holes equally distantfrom each other, as in the illustra-tion. Enlarge them Mith a rat-tailfile, twisting it, and pushing the edgeof the tin inwards, so as to make alip or burr. Make the holes equalin size to those in the 100 in 1Apparatus. For showing steady side pressureand its exact lan\ insert the U-tubeswith bends each half full of mercury;then fill the tube with water, and ob-serve not only the general effect upon the mercury, butmeasure the amount raised in each tube, and comparewith corresponding depths of water. Note. — To avoid confining the air in the tubes, pour in wateruntil it runs into first tube, then carefully pom- a little mercury into 71. 72 INDUCTIVE PHYSICS. tube funnel. Treat the second tube the same way, then pour moremercury into first if necessary, etc. To make this experiment ofsome aid to those not provided witli the apparatus, we have violatedour general rule, which is to show the apparatus in condition forthe experiment, and not dming it. In this case, we have shown itin progress, as the pupil should, whenever he makes a drawing toillustrate an experiment. Caution. — When handling mercury, be careful not to allow itto come in contact with a, gold ring; for the two metals will amal-gamate, giving the ring tlie appearance of silver. Sliould such anaccident liappen, lieating the ring cautiously will drive off the mercury,but the gold will need reburnishing-,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysics, bookyear1897
