Tag Archives: mobile

The First Mobile Phone?

In 1879, Professor David Hughes noticed that a clicking noise occurred in his home-made telephone whenever he used his induction balance. Hughes eventually found that the induction balance had a loose contact, and that the clicking went away when the contact … Continue reading

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Are Radio Waves Bad for Your Health?

The health risks associated with radioactivity have been recognized for many years. Alpha, beta and gamma emissions from radioactive sources can ionize atoms or molecules that they encounter by detaching electrons from them. People exposed to high levels of ionizing … Continue reading

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Synopsis

Here’s a brief summary of each chapter. Chapter 1:  The Birth of an Industry This chapter chronicles the early years of the electric telegraph. It starts with the chaotic scenes in the US congress when – after many setbacks – Samuel … Continue reading

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