A little boy had been pawing over the stock of greeting cards at a stationery store.
After a few minutes the clerk became curious and asked, "Just what is it you're looking for, sonny? Birthday greeting? Message to a sick friend? Anniversary congratulations to your mom and dad?"
The boy shook his head, "No."
"Then what kind of card is it that you want?" asked the clerk.
The boy answered wistfully, "Got anything in the line of blank report cards?"
Incandescent lightIn 1879, Thomas A. Edison privately demonstrated his incandescent light at Menlo Park, New Jersey. He had invented the lamp on 21 Oct 1879 after 13 months of experimentation to discover a suitable material for the filament. He found carbonized cotton filaments could operate for 40 hours in a vacuum inside a glass bulb. When the first public demonstration was given at Menlo Park on 31 Dec 1879, the Pennsylvania Railroad Company ran special trains there to enable the public to view the demonstration. |
