Tinkerisk:Or the historical package from 1894:
Which shows just how hidebound this ingredient is - the historic, as in 1700s, way to get vanilla flavour was to stick a vanilla pod in sugar and wait for the flavour to be absorbed. This stuff, late 1800s, is vanillin sugar, so with synthetic vanilla essence. So for at least 130 years what everyone else calls "a few drops vanilla essence" has been listed as "vanillin sugar" in German recipes, to the puzzlement of everyone else.
Same with the yeast quantities, it's always 42g because back in the middle ages you could only buy yeast from bakers and they divided a 500g block into a dozen cubes, each of which weighed 42g. Ingredients for a loaf of bread: 42g. Two loaves of bread: 42g. Small cake: 42g. Large cake: 42g. Ciabatta roll: 42g. Picnic for 5,000 followers: 42g and some fishes.