Home › Planting › Practical Wooden Label Used in Testing Beds

Practical Wooden Label Used in Testing Beds

PARADISE Nich upισμα Watsh 1907 FIG. 25 Mr. J. Horace McFarland, of Harrisburg, uses a label formed from a wooden block of cypress thoroughly soaked in white lead and covered with a rectangular piece of zinc. The writing is done with a solution of platinum chloride-ten grains to four ounces of water, put on with a gold pen Eisenach. 71B FIG. 26