89 



Appendix. 



THE EFFECT ON SNAKES OF ELECTRIC 



LIGHT. 



The various experiments I have made wff-h 

 snakes in Ceylon have led me to beSve that Told 



rats ^hat r."L '' " '^ ^^e mfrequency of the sun's 

 unsnif K "^f ^^^^ =^ ^I'^ate such as that of England 

 unsuitable for serpents. It is electricity that the 

 snake requires, and this is obtained from the sun's 

 rays m a tropical climate. In a cold climate the 



unneceianr' '" ' ""'^'"'t "°-^ -' "believe! 

 unnecessarily excessive, the temperature being 



often considerably higher than the average heat of 



a tropical jungle. Much of this excessivfartSia 



?oStnT ight ''''''■ ^^-"-sfully exchanged 



souJ^'lT'^'Tf^ ^\ ^^"^ ^'^"^^ statement may 

 made ' thT u"''"^ '^^ "™^™"^ experiments I 

 .rHfi '■ . u '^'""^ '"^'^■^^ withdrew from anv 

 artificial heat introduced into their cages thpv 



dearie li°hfr'°"w^° ^^'"^ beneath thfr^yfo'f 

 .n a dark Sr^e? nf^.t '^'^ "'"""^ "^^P' '^eir heads 

 Th« (^ S^ the cage to protect their eyes. 



activkv on S' '^'f ' fu'^' '^^^ ^^^ ^'^ '"^■"ease in 

 activity on the part of the snakes. 



