scientific studies on dry tortugas national park - Smithsonian Institution
cases it will be necessary for the analyst to exercise his own ingenuity in ... the detection of coloring matter in milk, 31, p. 279, and butter, 105, p.
cases it will be necessary for the analyst to exercise his own ingenuity in ... the detection of coloring matter in milk, 31, p. 279, and butter, 105, p.