364. Perpetual Motion?

In his search for a perpetual motion machine, Blaise Pascal devised the primitive form of which game?

363. Word of Honor?

This common term in the legal parlance means “(spoken) word” in French. It gets its origin from the Anglo-French chivalric practice in which the prisoners were released based on their word of honor to abide by certain restrictions.

Which word?

362. Fair and Lovely?

What you see in the picture is a practice (X) of cleaning and thickening fabrics such as wool by beating it with the foot. By the medieval period, a material (Y) occurring in nature was discovered to be pretty effective in doing this cleaning up, and gradually replaced the manual process to a large extent. As a consequence the material Y came to be named after the process X that it replaced.

Nowadays this material typically surfaces in stuff that the fairer sex smears on their faces.

Identify the material Y.