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isapracticalguidewritten in the early 20th century. This work falls within the category of educa tional publications aimed at teaching young boys the fundamental concepts andapplicationsof electricity through hands-onexperiments. Itemphasizes the importance of practical experience and experimentation over theoreti cal knowledge alone. The beginning of the text introduces the fascinating world of electricity, stressing the value of learning through practical applica tion while experimenting with various tools and techniques. Zerbe explains that electricity can be understood better when boys engage directly with the material rather than through rote memorization of its principles. He lays out the book's fundamental approach to education, which involves experi menting, building, and discovering the principles that govern electrical phe nomena. This foundational philosophy sets the stage for the more detailed chapters on specific electrical concepts and devices, reflecting a broader goal of fostering critical thinking and hands-on learning among young readers there isnostudysoprofound as electricity. Itisamarveltothescientistas well as to the novice. Itissimpleinitsmanifestations, butmostcomplex in its organizationandin itsramifications. Ithasbeenshownthatlight, heat, magnetism and electricity are the same, but that they differ merely in their modes ofmotion. FIRST HISTORICAL ACCOUNT.-The first historical account of elec tricity dates back to 600yearsB.C.ThalesofMiletuswasthefirsttodescribe the properties of amber, which, when rubbed, attracted and repelled light bodies. The ancients also described what was probably tourmaline, a min eral which has the same qualities. The torpedo, a fish which has the power of emitting electric impulses, was known in very early times
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