Ga: 
TaBLE SHOWING THE RESULTS OF ALL THE EXPERIMENTS DESCRIBED, AND COMPARING 
THEM WITH THOSE OBTAINED BY Mr. Pourron. 
Degrees of Colour. 
Colours used as stimuli and | 3) 2| |a|# aye Observations and 
number of experiment. 4) ape) &) lela) so! & Conclusions. 
a| | S ooh s | 20 a! oO 
1A a HA | Hla aA 
Black surface in darkness 2\1 1 = 4 
Z Black surface somewhat The Broatce darkness of the 
‘ —] pupe wit e increasing 
3 | shaded . 4y1 3| 2 illumination of the black 
5 | Black surface less shaded] 5 | 2 = 7 surface is very remarkable 
<, | Black surface probably and interesting. 
: less shaded .-15|6 Ny 
@ (I. A. Black surface in 
iS darkness ..12) 213 ee Strongly confirm the effects 
fe 4 3 : of black, but not the 
aI i pel oy Black surface in curious relation to illumi- 
a strong light i — nation. 
© (White surface in very 
AY strong light E 2p) 1 12 3 =19 The greater lightness of the 
. | White surface in pang pup with greater illumi- 
—Q light .. 1/272/5/141 =12/ nation is the converse of 
fea] White surface almost in Sapo s: with black sur- 
complete darkness .. 1 \1 ae ‘ 
II. White surface with | 
varying illumination, | The pent may pave be 
and obscured by other| respi y ek Mi lari 
gs colours towards end of few to draw conclusions. 
< qe iment 1}1 1 = 3 The results are probably due 
2 III. A. Pale pink in sha- to the light paper tending 
ra dow st ie 4/3/3]1)4/1 =16] to light pupa, the faint 
III. B. Same, only other eat i noms eee 
colours added in Stag hardly strong enough to 
III. ae 1 1}1 produce effect. 
Red-brick walls, illumina. = The dark tendency of a pro- 
Oe tion Seok variable }12!| 9 2 =23 |} mee Hes scene 
o) - 1S marke green elec 
Orange (deep) in fairly \ (and absence of pigment) 
FA strong light cee 1},2 2) 1]= 6) confirmed by P. brassicae. 
f | Yellow (pale) in fairly As above, only not sostrongly 
strong light 1 1 = Sidi ee gies P. brassic@ 
, (EV. RAS Strong yellow in Ba: i = “ire 
onnhrms e two latter re- 
S shadow. . 1 2 3/6 sults conclusively. Clear 
o +1V. B. Same, only other proof that the colours 
os colours added in Stage ane in = III. were 
TE: 2913/4] — 9) without effect. 
ae ellowish) inmode- 31 \2 1|1/=10 It is very remarkable and 
: rately strong light (2 3y1 li interesting that the green 
Ay | Same, with green leaves | (io ee should tend less strongly 
o4 ~ Pale bluish green in str ite pee) iecctnieons i 
i | Tae yellow fi ; 
lca light * 11 | 1 = 3 shown above. Confirma- 
Deep green paint, some- tion from P. brassicae. 
what shaded fal 1A) ali} 6 
_V. A. Green in shadow . 1}271/3 1 = 8 
V. B. Green of leaves in 
so shadow |2]= 2| These results quite confirm 
a Vv. G. Same as re : only those given above. 
. | other colours added in 
© | Stage III. 1 we ead baat : 
; e lightness of pup pro- 
_ Pale blue in shadow... a Spal = 5} bably due to paleness of 
a paper. 
faa] { Dark blue in strong light 1/2)2]1/1 1 — 8! Darker ee = 
