Who invented the multipication chart?

Question

I need any information the multipication process and how it is used in everyday life. Please and Thank you

Answer 1

Title:
Mathematics teaching device

Document Type and Number:
United States Patent 5759041

Link to this page:
http://www.freepatentsonline.com/5759041.html

Abstract:
A multiplication table teaching device having a body, the body having a front side and a back side, the front side having 55 multiplication problems located thereon and the back side having located thereon 55 answers corresponding to the multiplication problems located on the front side, the body having 55 body holes permitting the passage therethrough from the front side and the back side.

Good luck.

Answer 2

The historic previous of air con and Air Conditioners In 1902, in basic terms one 3 hundred and sixty 5 days after Willis Haviland provider graduated from Cornell college with a Masters in Engineering, the 1st air (temperature and humidity) conditioning exchange into in operation, making one Brooklyn printing plant proprietor greater desirable than happy. Fluctuations in warmth and humidity in his plant had brought about the size of the printing paper to maintain changing somewhat, adequate to make specific a misalignment of the coloured inks. the hot air con gadget created a great environment and aligned 4-colour printing grew to alter into obtainable. All as a results of new worker on the Buffalo Forge company, who started on a income of in basic terms $10.00 each week.