James Watt's Steam Engine Invention 1915 Ad Trade Card

Description

James Watt's Steam Engine Invention 1915 Ad Trade Card
NOTE:
THESE ARE NOT POSTCARDS
THEY ARE TRADE/ADVERTISING CARDS.
THEY ARE MUCH SMALLER THAN A STANDARD POSTCARD
AND
THERE IS ADVERTISING TEXT ON THE BACK!
THE CARD DIMENSIONS ARE APPROXIMATELY
2 5/8 '' x 1 3/8 ''  or  6.5 cm. x 3.5 cm.
THIS IS AN ORIGINAL 1915 TRADE - ADVERTISING CARD
WATT'S STEAM ENGINE
The Watt steam engine (alternatively known as the Boulton and Watt steam engine) was the
first type of steam engine to make use of a separate condenser. It was a vacuum or
"atmospheric" engine using steam at a pressure just above atmospheric to create a partial
vacuum beneath the piston. The difference between atmospheric pressure above the piston
and the partial vacuum below drove the piston down the cylinder. James Watt avoided the
use of high pressure steam because of safety concerns.Watt's design became
synonymous with steam engines, due in no small part to his business partner, Matthew Boulton.
The Watt steam engine, developed sporadically from 1763 to 1775, was an improvement on
the design of the Newcomen engine and was a key point in the Industrial Revolution.
GREAT IMAGE!
THE REVERSE SIDE HAS TEXT ABOUT THE IMAGE ON THE FRONT SIDE
SEE IMAGES ABOVE
THE CARD DIMENTIONS ARE APPROXIMATELY
2 5/8 '' x 1 3/8 ''  or  6.5 cm. x 3.5 cm.
NOTE:
THE IMAGE ABOVE IS LARGER THAN THE CARD
TO SHOW THE DETAIL.
THIS IS 100+ YEARS OLD
IT IS NOT PERFECT
THERE MAY BE VERY SLIGHT PAPER LOSS OTHER FLAWS
SEE IMAGES ABOVE!
WE COMBINE SHIPPING
BUY 1 TO 4 TRADE ADVERTISING CARDS AND THE TOTAL TO SHIP IS
BUY 5 TRADE ADVERTISING CARDS AND SHIPPING IS FREE
NOTE:
ON LARGER INTERNATIONAL ORDERS WE MAY REQUIRE REGISTERD
MAIL AND WILL SPLIT THE COST WITH THE BUYER.
INQUIRE IF CONCERNED!