PHYLLOTAXIS OF CONES. 451 
he adds: “It also appears that the necessary sequence of these 
successive steps of condensation, thus determined by the geometry 
of the case, does necessarily exclude the non-existent orders 4, 3, 
$, #1, ete.” This conclusion “determined by the geometry of the 
case,” proves to be only an incorrect theory, as shown by the fol- 
lowing : 
I examined nearly all the cones (one hundred and fifty-five) 
which grew upon a Norway spruce, seventy-four of which showed 
five parallel spirals to the right and eight to the left; while sev- 
enty-four showed eight spirals to the right and five to the left. 
Five cones had seven spirals to the right and four spirals to the 
left. One cone had four spirals to the right and six to the left, 
and one cone had six spirals to the right and four to the left. I 
will try to tabulate this and others in a briefer manner : — 
» 
NORWAY SPRUCE. ... 74 Cones had 5 spirals to the right, 8 to the left. 
On Tree No. poured Biy i é “ “ “ec “ 5 és “ 
1 oe 8 
5 t 7 “ “ (23 & “ 
1 ‘ce t 4 (23 éé ‘6 6 “ “ 
1 t “ 6 “cc t é 4 « “ 
On Wee Ne. boo Ie eR a Saye e 
21 t6 “ 8 é “ ét Gi core “ 
a ce “ce 4 ce ac ce 6 “ec “ 
IVAN S G N Oe ee eee 
19 “ “ 8 “ sc “ 5 «u “ 
1 “ t 7 “ “ i ae sc 
On Tree No.4) Cs (23 ét 8 éc “ec (23 5 é éé 
17 “ “6 5 t “ “ s « “ 
4 “ “ 7 “ oc “ 4 ét 4 
2 é “ 4 ‘“s +“ ét 7 « “ 
1 “ 4 4 “ 3 éé ġ «“ “ 
1 BE Mt 6 “ a é 4 és 
COT NOB is BE a a S 
44 “ é 8 éc se “ 5 ég “ 
6 é “ 4 “ s ; éé y E s 
3 “ é ri (z3 ég “u 4 “e (23 
1 t ct 4 “ “ “ g t é 
2 ‘“ “ 6 “ t é 4 ét i 
Ne a ee ee 
53 “ “ 8 ét é 4“ 5 “ “ 
1 T3 é £ “c “ec “ 7 é é 
6 “ é 7 t “ i 4 oe “ 
4 F ic é & é “ g “ a 
8 e é 6 é é “ 4 se c 
On ENOT y enin Bs a te s a he ue y 
13 ee I: l 
Fos romba oe Me “ s x 
“ 8 “ “cc “& 5 “ “ 
“ i “ “u ht e “ 
EUROPEAN LARCH. . . 29 bee a aie fn ` K Enga 
s “ 4 “ s i 7 “ “ 
2 “a “& 7 “ “ Pea es 
1 “ “a 3 “ “ “ 6 « t 
