325 
1911-12.] On a Continuous-current Motor-Gyrostat. 
The motor-gyrostat is provided with the following additional parts : — 
(1) Attachment for showing ordinary precessional motion of gyrostat. 
(2) Skate, for showing the “ gyrostat on skate ” experiment. 
(3) Stilts and attachments, for showing the “ gyrostat on stilts” ex- 
periment. 
(4) Attachments for allowing of the motor-gyrostat being fitted np to 
show the crossed bifilar pendulum experiment due to Lord Kelvin. 
(5) Mounting to enable the motor-gyrostat to demonstrate the principle 
of the gyrostatic compass. 
Fig. 3. — Motor- Gyrostat on skate. 
(6) Apparatus to enable the motor-gyrostat to be fitted up as a stilt 
top of new design. This experiment is due to one of the authors. 
(7) Apparatus to enable the motor-gyrostat to be mounted as a gyro- 
static pendulum. 
(8) Apparatus to enable the motor-gyrostat to be mounted to show the 
principle of the dirigible torpedo. 
(9) Apparatus to enable the motor-gyrostat to be mounted so as to show 
the principle involved in the Schlick device for steadying ships at sea. 
The accessories enumerated above are of entirely novel design, and for 
that reason it is proposed to describe them in some detail. In fig. 3 the 
motor-gyrostat is shown mounted on a skate. The skate attachment is 
readily slipped on the rim of the outer casing of the gyrostat, as shown in 
the figure. In this experiment the gyrostat is set down on the skate with 
