470 



ME. C. B. CLARKE ON 



cere ; dextrorsum itaque contrarium." Linna3us was a very fair 

 astronomer ; he here places himself in the normal position of an 

 observer in the north temperate zone, and looks south at the 

 midday sun : he says that then the right-hand way round is the 

 way of the sun. Every gardener of that day and of the present 

 reckons the same way. But A. DeCandolle says (' Phytographie,' 

 p. 202) that the words " meridiem adspicere " are entirely useless, 

 and that it makes no difference whether the spectator turns to 

 the north or to the south 5 and Asa Gray says the same. 



At this point we take leave of all questions of convention and 

 definition. This is the crucial point in the dispute ; and I main- 

 tain Lmnams to be altogether right, and that those who say he 

 is wrong have not understood him. If I turn north, the diurnal 

 revolution of the heavens takes place in the direction contrary to 

 the clock-hand. 



In fig. 1 a spectator at a observes, looking south, the dextrorse 

 contortion depicted : at 



XII the motion is from Fig. ] . 



left to right, at VI f rom 

 right to left, and (I might 

 add) at IX from foot to 

 head ; but it is all one way 

 round, which we are agreed 

 to call the right-hand way. 

 The spectator advances to 

 *, looking still south ; the 

 motion is still from left to 

 right at XII, from right 

 to left at VI; it makes 



th°p d f rrr h i s being within the «?™ ^^ <* without, h 



h!3 l° r ', ^^ faCe8 nor th, whether within or without 

 the .p, re> the direction of motion at both the points VI and XII 



LZ7 a ^' a \ deSCTihedin Fi S htand left; because simply the 

 spectator has altered the position of his own right and left hands. 



me at «7 Tv/* 7 ' * l0 ° k "* the P art of the cfrcle nearest 

 +„ 1 if 6 ' ?' and when * have crossed it and got within 



whL ""I u aUd l0 ° k at the same P 01 *ion of the circle 



VI reversed T^ "? "^ "" the direction of motion at 



«-ifk- V .^ rse .' * re Pty> "Yes; but not because you entered 



wrtkm the circle, but because you turned round and faced north." 



■ UeCand0lle "y * makes no difference whether you look 



