Tesla, the great electrician, has put himself on record as intimating that the want of sleep is a potent factor in the deplorably heavy death rate of the present day.

Tesla's multiphase alternating-current motor.

The Ruhmkorff induction coil has in late years been greatly improved both by Tesla and Elihu Thomson, who, separately and independently of each other, have produced excellent forms of high-frequency induction coils.

Fortunately, these difficulties were overcome by the genius of Nikola Tesla, in the invention of the multiphase alternating-current motor, or the induction motor, as it is now generally called.

Although Baily, Deprez, and Ferraris had accomplished much before Tesla's time, yet it was practically to the investigations and discoveries made by Tesla, between 1887 and 1891, that the induction motor of to-day is due.

Although Baily, Deprez, and Ferraris had accomplished much before Tesla's time, yet it was practically to the investigations and discoveries made by Tesla, between 1887 and 1891, that the induction motor of to-day is due.

For some reason Gustav deLaval, followed by C.A. Parsons and Nikola Tesla, broke away from this spell, and we have the steam turbine engine.

Such effort may result in slight refinements of a given type, but never would have invented the DeLaval or Tesla turbine.