. How to make and use electricity ... USE ELECTRICITY. 5 sation od the akin, resembliog that produced by a cobweb. Inthis latter case, the paper should be held within a quarter ofan inch from the face. This is a neat little trick for boy? toplay upon their schoolmates who sit in the bench before them. All the above experiments simply indicate the presence ofelectricity in these bodies, and also furnish proof for the factthat it generally makes itself known by either attraction or re-pulsion. Although friction is the most common and by far the most ex-tensive means of exciting bodies, yet it is
. How to make and use electricity ... USE ELECTRICITY. 5 sation od the akin, resembliog that produced by a cobweb. Inthis latter case, the paper should be held within a quarter ofan inch from the face. This is a neat little trick for boy? toplay upon their schoolmates who sit in the bench before them. All the above experiments simply indicate the presence ofelectricity in these bodies, and also furnish proof for the factthat it generally makes itself known by either attraction or re-pulsion. Although friction is the most common and by far the most ex-tensive means of exciting bodies, yet it is not the only means. Electricity is manifested during the changes of state inbodies, such as liquefaction and congealation, evaporation andcondensation. Some bodies even are excited by mere pressure;others by the contact or separation of different surfaces. Mostchemical combinations and decompositions are also attendedby the evolution of electricity. If we rub a piece of amber, sealing-wax or any other resinoussubstance on dry woolen
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectricity, bookyear
