- 1879 – Using a filament of carbonized thread, Thomas Edison tests the first practical electric incandescent light bulb (it lasted 13½ hours before burning out).
- 1907 – Panic of 1907: A run on the stock of the Knickerbocker Trust Company sets events in motion that will lead to a depression.
- 1924 – Toastmasters International is founded.
- 1927 – Nikola Tesla exposed his six (6) new inventions including motor with onephase electricity
- 1976 – Red Dye No. 4 is banned by the US Food and Drug Administration after it is discovered that it causes tumors in the bladders of dogs. The dye is still used in Canada.