4A
ANALYTICAL
CHEMISTRY
22 spaces were
yet tobe field...
1898:
I
N 1898—when the Curies discovered radium—the name of Merck was firmly established in the world of chemistry. Laboratory chemists relied on the quality of Merck products and o n technical aids supplied by the company. N o w , fifty years later—when science has progressed to the synthesis of radioactive isotopes—Merck chemicals reflect an impressive background of experience and skill. Highly perfected manufacturing and control methods, created o r utilized by Merck, assure unquestioned uniform purity. That is why more and more chemists specify MERCK LABORATORY CHEMICALS.
MERCK LABORATORY CHEMICALS MERCK & CO., Inc. New York, N. Y. ·
Manufacturing
Philadelphia, Pa. ·
Chemists·
St. Louis, Mo. .
RAHWAY, N . J .
Chicago, III. · Elkton, Va.
Los Angeles, Calif. · In Canada: MERCK & CO., Ltd. Montreal · Toronto · Valleyfield
MERCK'S REPORT listed the atomic
weights of 74 elements. Some knowledge of a few additional elements existed, the remainder still were unknown. (The twenty-two not listed in 1898 have been omitted from the modern chart above.)
1948: MERCK issues an up-to-date revision of the Periodic Chart, presenting the Periodic Table, as well as the Electromotive series, in easy-reference style. Copies of this convenient and useful aid to chemist and student will be mailed on request.
