A classic piece of farm equipment! It’s designed to help farmers gather or "rake" hay into windrows, making it easier to collect and manage. 

The "sulky" part refers to the fact that it’s typically a type of self-propelled or rider-operated rake, where the operator sits on a seat (sulky) while it’s in use, which makes the process more efficient and less physically demanding compared to walking behind manual rakes.

As for the dump feature, it refers to the ability of the rake to dump its collected hay into a pile or row once it’s full.

This allows for quick unloading and a more organized collection of hay, which is helpful in large haying operations.

Sulky rakes, especially in the days before modern machinery, were a big step up in making hay collection more efficient, reducing the time and labor involved in the process.