STUDY XI. I4i 



reverberated perpendicular, of a cone or ear form, 

 collects on the antherse of the flowers, an arch of 

 light of ninety degrees, from the Zenith to the 

 Horizon. It farther prefents, in the inequality of 

 it's panels, reflecting furfaces. 



The conical reflector collects a cone of light of 

 fixty degrees. The fpherical reflector unites, in 

 each of it's five petals, an arch of light of thirty- 

 fix degrees of the Sun's courfe, fuppofing that Lu- 

 minary to be in the Equator. 



The elliptical reflector collects a fmaller quantity, 

 from the perpendicular pofition of it's petals ; and 

 the parabolic reflector, as well as that with plane 

 mirrors, fends back the rays of the Sun diver- 

 gently, or in parallels. 



The firft form appears to be very common in 

 the flowers of the icy Zones ; the fécond, in thofe 

 Which thrive under the (hade ; the third, in tem- 

 perate latitudes ; the fourth, in warm countries ; 

 and the fifth, in the Torrid Zone. It would like- 

 wife appear, that Nature multiplies the divifions 

 of their petals, in order to diminifh their action. 

 Cones and ears have no petals. The convolvulus 

 has but one ; rofe-formed flowers have five ; ellip- 

 tical flowers, as the tulip and the liliaceous, have 



fix; 



