Transadions Society Naval ArchUccis and Marine Engineers, Vol. 20, igi2. 



To illitstrutc paper on "Aclivc Type of Stabilizing Gyro,' 

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



Plate yg 



Figure 1 



Figure 3 



Figs, i, 2 and 3.— Curvss of Undamped Rolling op Ship in Different Seas. 



