1902 Original Hamoglobin-Skala Perforated Filtering Paper Book Made in Finland

Original Hamoglobin-Skala patented in the US No 703319, June 26th, 1902. This is a hardcover book of blood testing paper strips used in medical labs. Instructions for use on the inside front cover. Published by T W Tallqvist in Finland, Helsingfors Annegatan 16. Condition is good for age. A little soiling on the papers and the inside back cover. See photos. Measures 7 3/4" x 3 3/8" x 3/8" G3D040421