Royal Observatory 36 Inch MirrorTelescope c80 Y/O Trade Ad Card

Description

Royal Observatory 36 Inch MirrorTelescope c80 Y/O Trade Ad 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 DIMENTIONS ARE APPROXIMATELY
2 1/2 '' x 1 3/4 ''  or  6.3 cm. x 4.5 cm.
THIS IS AN ORIGINAL c80 Y/O TRADE - ADVERTISING CARD
ROYAL OBSERVATORY 36 INCH MIRRORTELESCOPE
On 13 March 1931, the cigarette manufacturer, William Johnstone Yapp offered to present the Observatory
with a large telescope as an appreciation of the personal work of the Astronomer Royal, Frank Dyson.
After careful consideration it was decided to order a 36-inch reflector with a spectroscope and a new
34-foot dome at a cost of ,000. An order for the telescope and dome was placed with Messrs. Sir
Howard Grubb, Parsons & Co soon after. The main mirror is of 36 inches clear aperture and 15 feet focal
length. The disc was cast by the Parsons Optical Glass Co. of Derby. It is 6 inches thick, has a 7-inch hole in
the centre and weighs 550 lb. The telescope became known as the Yapp 36-inch Reflector. It was the
largest telescope at the Observatory until the opening of the 98-inch Isaac Newton Telescope at
Herstmonceux in 1967.
NOTE:
THE REVERSE SIDE HAS TEXT ABOUT THE IMAGE ON THE FRONT SIDE.
THE CARD DIMENTIONS ARE APPROXIMATELY
2 5/8 '' x 2 ''  or  6.5 cm. x 5.2 cm.
NOTE:
THE IMAGE ABOVE IS LARGER THAN THE CARD
TO SHOW THE DETAIL.
THIS CARDS IS NOT A MODERN REPRODUCTION
THIS CARD IS c80 YEARS OLD
IT IS NOT PERFECT AND THIS CARD MAY HAVE
SLIGHT PAPER LOSS
SMUDGING
ROUNDED CORNERS
SURFACE CREASE
SEE THE IMAGES ABOVE!
37
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!