The image is a vintage scientific diagram, likely from a textbook or journal. It depicts a funnel-shaped structure filled with a series of horizontal, wavy lines in a reddish-pink hue. The funnel narrows significantly towards its base. Along the sides of the funnel are vertical scales marked with numbers, ranging from 0 to 1000 on both the left (labeled 'A') and right (labeled 'B') sides. Horizontal lines extend from the funnel at various points, each marked with a corresponding number (e.g., 256, 372, 572, 771, 895). The letters 'G' and 'I' are also marked on the diagram. Below the diagram is the caption 'Fig. 16.' and a small line of text indicating the publisher: 'F. Hall, Smith & Turner, 6 Furnival St. Holborn, London. E.C.' The background is a pale yellow or cream color, giving the image a distinctly antique appearance.