Before cleaning, you must wear the industrial rubber picking fingers, one hand inside the liquor should be worn two ones, and the other hand outside of the apparatus only need to be worn one.

In practice, we often need observe characteristic curves of all apparatus. These curves are hardly drawed by hand directly, but using MATLAB protracts the curves rapidly and briefly.

As to the rounds, they were made of a sort of red cedar, with light, strong branches; and this apparatus was wrought by the masterly hand of Pencroft.