Trr.nsaciions Society Naval Architects and Marine Engineers, Vol. i8, igio. 



Plate $8 



To illustrate paper on " The Gyroscope for Marine Purposes," 

 by Elmer A. S perry, Esq., Member. 



SCALE FOR TIME -SECONDS 



I I I I I I I I I I I I I I ' I ' ' ' ' I ' ' ' ' I ' ' ' ' I ' ' ' ' I ' ' ' ' I ' ' ' ' I ' ' ' ' I 

 10 20 30 40 50 



< 

 CO 



ROLLING-MOTION, GRADUALLY EXTINGUISHED BY FRICTION 



ROLLING MOTION. SPERRY GYROSCOPE WORKED PASSIVELY 



ROLLING MOTION, SPERRY GYROSCOPE OPERATED ACTIVELY 



