A couple of minor corrections
1)
Not all states are on the back of a five-dollar-bill.
The following twenty-six are on the top of the Lincoln memorial:
First Row –
Arkansas
Michigan
Florida
Texas
Iowa
Wisconsin
California
Minnesota
Oregon
Kansas
West Virginia
Nevada
Nebraska
Colorado
North Dakota
Second Row –
Delaware
Pennsylvania
New Jersey
Connecticut
Massachusetts
Maryland
Carolina
Hampshire
Virginia
New York
Dollar bills are paper, not cloth.
They are made from cloth-based paper (as opposed to wood pulp).
You can see red and blue threads imbedded in all bills.
It used to be a silk-based paper many years ago.
The paper is very durable compared to regular paper, but it will break down over several washing-machine cycles.
Counterfeiters would sometimes bleach the ink off of low-denomination bills and then print a higher-denomination on the blank paper.
Almost all books and seforim printed nowadays use wood-pulp based paper.
2)
Objects that are closer require a more convex lens shape for proper focus. As we age, the lens loses flexibility and its controlling muscles weaken, hence the reading-glasses requirement that many people over 40 or 50 develop.
3) (not a correction)