Syphon Barometer Atmospheric Pressure Gauge 1915 Ad Trade Card

Description

Syphon Barometer Atmospheric Pressure Gauge 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
SYPHON BAROMETER
The basic construction, unchanged since Torricelli's experiment in 1643, is a glass tube about
three feet long, closed at one end, filled with mercury, and inverted with the open end
immersed in a cistern of mercury. With the cistern surface exposed to atmospheric pressure,
the height of the mercury column varies with that pressure. Mercury barometers may be
classified into three groups according to their construction: cistern barometers, siphon
barometers, and weight barometers.
GREAT IMAGE!
THE REVERSE SIDE HAS TEXT ABOUT THE IMAGE ON THE FRONT SIDE
SEE IMAGES ABOVE
THIS IS 100+ YEARS OLD
IT IS NOT PERFECT
THERE MAY BE VERY SLIGHT PAPER LOSS OTHER FLAWS
SEE IMAGES ABOVE!
THE CARD DIMENSIONS 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.
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!