A simple but costly lamp of hand-blown glass with an open reservoir for tallow, oil, or grease and a protruding wick tube. The clear glass allows the user to gauge fuel level at a glance, and the open design means it can be quickly refilled or relit. Most often kept indoors on a table or shelf, as the exposed flame offers little protection from wind or water.
Lamp. glass
Hand-blown glass lamp with open reservoir; shows fuel level clearly.