| Year |
Description |
Perspective |
Preview |
| 1780
to 1954 |
Pennsylvania
becomes 1st US
state to abolish slavery (for new-borns only) |
Perspective
on abolition of slavery
and civil rights |
Slavery
& Equality |
| 1790
to Today |
1st US
census authorized |
Perspective
on the growth of the
country |
Our country grows |
| 1983
to 1999 |
Compact Disc
recordings developed by
Phillips & Sony introduced |
History of
Recorded Sound |
What's
that sound coming from? |
| 1836
to 1938 |
History of
Child Labor Laws |
Then and Now
perspective on laws
regulating child labor |
Our children work |
| 1910
to 2007 |
Things
get expensive |
Price
of ketchup in New Jersey over last
100 years |
Ketchup gets
expensive |