It says:
I have a knee operated White machine (1937). The cabinet has one drawer on the left, wider and more narrow than the 3 drawers on the right side. In a drawer on the right side is a little shelf with two holes in it that holds 2 small glass bottles that have black tops. Each bottle top has a hole in it that can be covered by a built in slider. I need to know what the bottles are used for. Thank you for your time. D Daniel