14 APRIL 1888, Page 24

Electrical - Instrument Making for Amateurs. By S. R. Bottone. (Whittaker and

Co.)—Ingenious amateurs will gladly welcome the aid which M. Bottone furnishes them ; it supplies a want felt by even the cleverest of young philosophers. The number of tools required seem to us very reasonable; possibly some might find them insufficient; at any rate, they are within the reach of all ; and a good mechanic should be able with such help to obtain endless benefit and amusement. Great accuracy is out of the question, but with care results could be obtained of a value sufficient to demon- strate such laws, as can be seen in the action of such useful machines as electrical machines, electroscopes, galvanometers, dynamos, and batteries.