_To the Editor of the Scientific American:_
In the description of the pneumatic clock, copied from _La Nature_,
and published in your journal of date 1st of March, the invention is
credited to me. Such is not the case. By an arrangement between Mr.
Wenzel, Mr. Brandon of Paris, and myself, patents have been obtained
in France, England, etc., for the clock, and issued in my name; but
the honor of the invention belongs exclusively to Hermann J. Wenzel,
of San Francisco.
Yours faithfully,