It got glowing endorsements

by Phelps Gates

     
       
         
       
   
           
         
     
       
                                       

A.   SI units of radioactivity

B.   camel`s backbreaker (2 wds)

C.   pitchblende

D.   NJ county: site of a Revolutionary battle and a
horse track

E.   British novelist and philosopher (1872-1963)

F.   in the open air

G.   third Nobel laureate of her family (2 wds, 1 hyph.)

H.   Celsius`s nationality

I.   become rigid and inflexible

J.   naming systems

K.   peculiar, unusual

L.   undertows, for example

M.   military camp commanded by Amos T. Halftrack

N.   the largest even-toed ungulate

O.   Plato`s school of philosophy

P.   Jerry Lewis`s birthplace

Q.  
political appeal to the lowest passions of the populace

R.   one prone to drop things (colloq.)

S.   taking immediate advantage of a situtation

T.   too expensive

U.   city named for longest-serving Soviet head of state