the gyrostatic compass
TRANSCRIPT
© 1920 Nature Publishing Group
© 1920 Nature Publishing Group
© 1920 Nature Publishing Group
© 1920 Nature Publishing Group
© 1920 Nature Publishing Group
TRANSCRIPT
© 1920 Nature Publishing Group
© 1920 Nature Publishing Group
© 1920 Nature Publishing Group
© 1920 Nature Publishing Group
© 1920 Nature Publishing Group