100 Friedrichs-d'or don't make 900, but 700, florins,at least so I am told here.

The new mercury pump constructed by Messrs. Greisser and Friedrichs, at Stutzerbach, is remarkable for simplicity of construction and for the ease with which it is manipulated, and also because it enables us to arrive at a perfect vacuum.

By Richard Courant & K. O. Friedrichs.

Nina Courant (W) & K. O. Friedrichs (A); 2Aug76; R639145.

By Richard Courant & K. O. Friedrichs.

Nina Courant (W) & K. O. Friedrichs (A); 2Aug76; R639145.

I have always envied the Friedrichs and the Josefs that faculty, but never more than now when I quite despair of finding in my mind's pockets the suitable coin!"