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Abercromby Ralph Shadow Of A Mountain by NWS

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									                                          Science service Feature
Released upon receipt
but intended f o r use
June 23, 1933                               ?   W I f Y ~ W ~? ~ R                 Nailed June 16,1933

                                       By Charles F i tzhnzh Talman         ,
                                                        e
                                        'Authority on M teorolo,v.

                                            - SHADOY
                                            THE              02 a_ MOUNTAIN

             S m e tempts t o mountaineering, and the mountaineer has many opportuni-
              u mr
t i e s to observe i n t e r e s t i n g pwnomena of the atmosphere peculiar t o high a l t i t u d e s .

One of these is the shadow of an isolated peak c a s t a t sunrise o r sunset upon the

sky o r upon the adjacent lowlands.              Ralph Abercromby, the B r i t i s h meteorologist who

traveled far and Tide i n search of weather experiences, thus describes the shadow

of Teneriffe:

             11 was fortunate enough t o witness the shadow of the peak projected
              1
against the eastern sky at sunset from the Astancia, a t a height of 10,500 feet.

Every stage of the phenomenon could be followed.                    F i r s t the pointed shadow of the

peak l a y sharply defined on the rugged f l o o r of the old crater: then the apex

crossed the sea t o the horizon, and then the highest point rose out of the ocean

l i k e another peak and just broke i n t o the pink f r i n g e that lined the horizon at

sunset.     The vhole was now f a i n t and graaually died out as the sun went down lower

and the l i g h t became so dim from a s l i g h t haziness that the ordinary phenomenon of

the shadow of the e a r t h bounded by a pink fringe could not be seen r i s i n g out             Of

the east.

              !!%ere could not, however, be the s l i g h t e s t doubt of the accuracy of the

generally received explanation that the appearance of the shadow on o r against the

sky i s simply p a r t of the ordinary e a r t h shadow, projected s o c l e a r l y as to show

w e l l marked i r r e g u l a r i t i e s of the surface   , such as   isolated peaks.

                               ( A l l r i g h t s reserved by Science Service, Inc.)



                                              SCIENCE SERVICE
                                       2 l s t and Constitution h e .
                                              Washington, D. C,

								
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