Practical Radiography: A Hand-Book of the Applications of the X-Rays (Classic Reprint) - Softcover

Ward, Henry Snowden

 
9780282413163: Practical Radiography: A Hand-Book of the Applications of the X-Rays (Classic Reprint)

Synopsis

Excerpt from Practical Radiography: A Hand-Book of the Applications of the X-Rays

As is well known, any ordinary source of electricity, whether a battery, dynamo, friction machine, or what not, has two poles or terminals, relatively described as positive and negative. If these are connected by means of a wire we form what is known as a circuit; and when the battery (etc.) is in action a current of electricity passes along the wire.

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