Inside Out Library · Explore

Scientific American, Vol. 89, No. 8 (August 1903) (1903)

leaf 4

An illustration from Scientific American, Vol. 89, No. 8 (August 1903), 1903, leaf 4
o be from beaver case the material has been entirely removed, showing the full diameter. The two tracks shown are merely used for picking up the cast-iron plates and placing narrow-gage working tracks for the contractors. Ul- them in position ready for bolting up. It is interesting to know that in… … trically controlled by two levers, one of which con- SECTIONAL VIEW OF HELIGOLAND LIGHTHOUSE trols the motor mounted in the base of the searchlight which operates the projector in a vertical direction PBOJECTOBS. PBOJECTOBS OF THE HELIGOLAND LIGHTHOUSE. © 1903 SCIENTIFIC AMERICAN, INC

Tunnel · Gas · Electrical engineering · Device · Apparatus · Gas engine · Scientific American · Hudson river · Western cattle · Power plant · Electric motor · Horse power · Power gas · Point reyes · Blue prints

Internet Archive · Public domain (published before 1931). Free to use for anything.

More pictures from Scientific American, Vol. 89, No. 8 (August 1903)

More like this