Table 2. Effect of ringing on the nitrogen content of lilac leaves (Syringa vulgaris) when the ring is made the previous season. Stem ringed 
August 6, 1920. NaNOz added to soil July 30, 1921 
July, 1923] 
CURTIS 
EFFECT OF RINGING A STEM 
c; 
> 
X 
r^ 
m 
ON 
0 
r^ 
0 
0 
00 
J2 
0 0 
0 
, cJ- 
q 
cq 
q 
’cj- 
d 
hi 
a 
fO 10 
ON 01 NO 
01 d -00 
hh in cq 
cq q in cqoq 
hh O' hh 01 hh 
h row 
■d- -d - ”d- 
oi 1000 ’ 
co co co 
<0 00 * co oi in 
tC.NO* 00* NO* r-C 
i>* r>. 
CO CO CO 
ONOO CO 
CO CO co 
r^» t>» tn» tn» 
CO co CO CO CO 
<D 
> 
x 
CO 
O 
*■5 
0 
ON 
0 
ON 
0 
O V 
•*->X 
0 
10 
q 
d" 
q 
NO 
<U 
0} 
Pi 
O 
M 
lOCPN 
CO on M 
NO iq m 
O oq d* 
m q 01 cq tq 
q O' in -^-Nq 
W 
O 00 ON 
ONOO* On 
co 01 * co 
co rd C* 
in 0 * in oi in 
in h^-oo* hh’ rC. 
a 
O On ON 
10 10 10 
co hh OI 
no m no 
O hh O O O 
NO NO NO t^NO 
M 1-1 M 
HH HH HH HH HH 
rt • 
4-> bfl 
00 0 ) 10 
O 01 01 
00 00 00 
oi oq in 
q no co H-t- q 
tJ-no O ^ cq 
OI 00 1-0 
H NO* rf 
01* NO* 00* 
rd 0 * oo* 
oi o’ oi O* r^. 
in 0 cooo id 
c 
0 a 
00 tJ-vO 
H ON ON 
00 01 10 
Tt-NO hh 
moo •+ioo' 
no moo r^ 0 
-• 
M fl M 
CO CO CO 
l-H HH HH 
CO co co CO 01 
HH HH HH HH HH 
0) 
> 
x 
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Tt* 
*1- 
0 8 
O 
NO 
0 
NO 
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q 
-cd” 
q 
C 
0) • 
bo bfl 
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<U 
P4 
u 
1-1 
H <d 
g Q 
mg. 
00 oi q 
oq co q 
m 00 lq 
hh iq rq 
H-t- 01 NO rq OI 
^ CTs CO 
-t- in in 
co d- •d" 
id 10 no 
oi oi oi 
10 NO NO NO NO 
H H H H H 
01 01 01 
1-1 1-1 1-1 
01 01 01 
HH HH 
01 01 01 01 OI 
hh ~ 1 
<u 
> 
X 
NO 
O 
'■5 
_ 0 
O 0) 
-‘-'X 
U 
0 
0 
0 
O 
0 
00 
gen 
dec. 
$ 
q 
q 
c 
NO 
q 
m 
2 c 
4J » 
£ S 
fci) 
a 
co q "d- 
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qc N 
q *d- 01 
tq On O On NO 
qNO 'd- cq oi 
G 
■4- rt- -d- 
CO d" d" 
O' d"NO* 
CO hh 01* 
CONO* 00* r^NO* 
O* O* hh* oi HH* 
CO rO co 
01 01 01 
CO co co 
01 01 01 
co co co co co 
01 01 01 01 01 
C 
<v 
01 O NO 
NO 01 d" 
NO Tj-O 
NO O O 
O OC NO O 
GO 00 01 Th ri- 
M 
Ni-up 
On CO hh 
VOOO I^- 
I qNO NO 
cq -q q cq 01 
0 . M . 'T'°. 
2 
N. 10 P 
CO O* 01 
oi 00 * in 
CO On CO 
oi rd co On co 
oi 0 * rd in co 
•ti 
ONOO O' 
d" d* d - 
H ONO 
•in m Th 
HH 01 01 01 O 
m in m m co 
£ 
hH 1-1 
HH HH HH HH HH 
co Cl 00 
00 H 01 
Tj- ONCO NO CO 
"d" co On co O 
NO CO Tt- 
1^ hh M 
00 d^NO 
mNN 
h^-00 MON 
hh On cO m ON 
C £? 
Tj -00 NO 
Nh n 
d- oi 00 
co 00 
cono m Tf hh 
in hh On 01 00 
On cO NO 
hh 00 q 
hh 00 On 
q- rq *n 
Tt-00 NO 00 On 
q- cq q OnOO 
> 
CO CO CO 
co oi oi 
d- CO CO 
"d- rf CO 
-of -rf CO 
•h^- rj- rf oi 
N On h 
H 01 01 
d" co d* 
m 0 00 
NNNinO 
m n 0 no ^ 
S 
C* O 
hh O hh 
NCOON 
NO O 00 
COOO NO 
rt- UO in 01 hh 
H ION ONOO 
1-4 
CO CL) 
W T3 
°q>ON 
oi oi oi 
00 NO iq 
I—1 1—1 HH 
00 On 00 
oi oi oi 
cq tq ON 
01* 01* HH* 
cq q- oi t)-oo 
CO CO CO CO oi 
iq ^ iq 
oi oi oi oi hh* 
Number 
<3 
> 
O O 
C O 
CO CO 
Cl M CJ (S 
NO NO NO NO 
°5 
M H H H 
M 
<D 
O O 
O O 
01 01 
01 01 
Q 9 
_c0.cq 
_cO,co 
01 ^ 
OI OI 
.ON JO ^^n 
^On^^^^_On 
Q 
0 £ 
1 
1^ 
'rd'rd 
00 00 
oo'oo' 
On O' O' On 
On On O' On 
53*© £> 
* & 
X! 
<v 
fcJO 
P 4 
So 
% 2 
0) 01 
U 
00 bJO 
<v d 
ta Jr, 
.5 £ 
c* < 
53 *© <0 4> 
^ a» 
o u 
CD <u 
-c > 
U < 
-c 
OJ 
toiO 
C* 
367 
Averages for ten leaves. 
