If you can't add 5 & 17, you can rely on the adding machine.

What can it do for you?

Get this wonderful device before it is gone! It is going fast and prices will rise in the next month. Just one crank and you could have the answer to any addition problem you desire. William Seward Burroughs has just received a patent, on August 21, 1888, after designing it in St. Louis, Missouri.

How They Work

You must punch in the digits and pull the hand crank. If you release the crank, it will add to the sum you already have. Your sum will print out on a piece of paper.

Impact on America

It has opened the gateway to many other devices now commonly called the calculator. The calculator is now an exepected tool in math classes across the nation. Just imagine your algebra class without the calculator. That would take forever.