vitriol.png
This image is a line graph charting the frequency of usage for two specific terms over a period of 200 years. The background is white with light gray grid lines forming a rectangular coordinate system.

At the top center, there is a legend identifying the two data series. A blue square corresponds to the word "vitriol," and an orange-red square corresponds to the phrase "sulfuric acid."

The horizontal axis at the bottom represents time in years. It begins at 1800 on the far left and ends at 2000 on the far right. There are vertical grid lines marking every twenty-year interval: 1800, 1820, 1840, 1860, 1880, 1900, 1920, 1940, 1960, 1980, and 2000.

The vertical axis on the left represents percentage values. The scale starts at 0.0000000% at the bottom and increases in increments of 0.0001000%. The labels read from bottom to top: 0.0000000%, 0.0001000%, 0.0002000%, 0.0003000%, 0.0004000%, 0.0005000%, 0.0006000%, 0.0007000%, and 0.0008000% at the very top.

There are two distinct lines plotted on this graph:

The blue line, representing "vitriol," begins in 1800 at a value of approximately 0.0004%. It fluctuates downwards over the next few decades, reaching its lowest point around 1835 near the 0.0001% mark. From roughly 1860 onwards, the line remains very low and relatively flat, hovering just above the bottom axis for the remainder of the timeline until 2000, where it shows a slight upward tick at the very end.

The orange-red line, representing "sulfuric acid," begins at 0% in 1800 and stays flat along the bottom axis until approximately 1875. Around that time, it begins to rise slowly. By 1900, the upward trend becomes steeper. The line continues to climb sharply through the early 20th century, reaching a dramatic peak between 1940 and 1950. At its highest point, just after 1940, it reaches slightly above the 0.0008% mark. Following this peak, the line drops precipitously until about 1960. From 1960 to 2000, it continues a gradual decline, ending at a value slightly below 0.0001%.
This description was generated automatically. Please feel free to ask questions if you have further questions about the nature of the image or its meaning within the presentation.