Holland Claims the Microscope.

To the Editor:  —Allow me to call your attention to an error in The Journal of September 14th, which mistake I have recently seen in one or more other journals. On page 385 of The Journal, under the caption of "The Tercentennial of the Microscope," you ascribe the invention of that highly useful instrument to a Zacharias Janssen, of Magdeburg, the capital of a Prussian province, Saxony. Zacharias Janssen, to whom belongs the credit of constructing the first compound microscope (the simple microscope was known previous to that time), was not a German but a Hollander, born and reared in Middelburg, the capital of the province of Zeeland, one of the eleven provinces of the United Netherlands.Germany and the Germans seem particularly anxious to monopolize the credit of most of the useful inventions—now they lay claim to the invention of the microscope. "Honor to whom honor is due."Muskegon,