424 
llEPOKT OP CHp:jJICAL LABOIIATORY 
Season of 
collection 
It is evident tliat cold at the time of tapping has a great retarding effect on gum 
production. It is possible that the growth of the microbe is inhibited by the low 
temperature and the wound has a chance to heal liefore effective infection has taken place. 
SeasiiH of collection. Tabulated statements of some of the resnlts obtained from the 
experimental tappings carried out during the season of 1911(5-1907 will be found in tlie 
following tables; — 
GARDEN OF ALI NUR-ED-DIN, NEAR TAIARA 
•3li Small Trees 
Tapped in the ordinary n.atir-e maimer. December l.oth, 
P 
5 
Viscosity of 20 per 
cent, solution 
1 Laboratory No 
1 
i 
Number of 
Collection 
Date of 
Collection 
Yield per tret 
Character of (ium 
Acidity 
{milligrams i 
KIIO requirt 
to neutrali; 
one grammel 
Asli of cleaned g 
Degrees of retard¬ 
ation in torsion 
viscosimeter 
Grammes of sugar, 
per lOO c.c. of solu¬ 
tion, required to 
produce same 
viscosity 
7.50 
1st 
Jail. 17th, '07 
0-134 rotl 
Semi-glassy. Small pieces, but 
uot powdery 
3-14 
■2-9G 
40-5’ 
03-4 
7()() 
2nd 
Fell. 4th, ’(17 
0*210 rutl 
Like 1st collection 
2-74 
2-9G 
.31-.5° 
Gl-8 
7f.l 
3rd 
Fell. 15th, ’ll? 
0-l.-j4 rotl 
Like 1st culleetuin 
2-55 
2-8G 
31-0 
Gl-7 
7G-2 
4th 
ilar. 8th, ’07 
0-091 rotl 
Like 1st collection 
2*55 
2*89 
29-.5° 
(11-3 
7G3 
5 th 
Mar. 22nd, '07 
0-083 rotl 
Slightly lighter in colour, more 
powdery 
2-.55 
2-74 
2C-.5’ 
()i)*7 
887 
Not 
received 
Gth 
Apr. 7th. '07 
0'0r)8 rotl 
Like .5th colleotiun 
2-lG 
2-88 
24-.5° 
GO-2 
at 
labora¬ 
tory 
7th 
M.ay 13th, '07 
0-034 rotl 
30 JIiDDLE-sizEi) Trees 
Tipiped in tlie ordinary native manner, Deeemlier l.'itli. lOUCi 
7()4 
1st 
.Ian. 17th. '07 
0-183 rotl 
Light colour. Small fragments. 
Friable 
2-94 
•2-99 
rojjy 
— 
7G5 
2nd 
Feb. 4th, '07 
0-284 rotl 
Darker (colour. Larger tears ... 
.3-14 
3-09 
30-5 
01- 
7G0 
3rd 
Feb. 15th, '07 
0-2GG rotl 
Lighter in colour than former ... 
2-74 
2-84 
3:1.7 
0-2- 
7G7 
4th 
Mar. .8th, '07 
l)-225 rotl 
Mostly glass-like. Fair-sized 
fragments 
2-74 
■2-87 
31-8 
Gl- 
708 
nth 
Mar. 22nd, '07 
0-17n rotl 
Similar to 7(57 
2-.55 
2-80 
28-5 
01- 
88G 
Not 
received 
Gth 
Apr. 7th, '07 
0-134 rotl 
Mostly small fragments... 
2-35 
2-78 
27-0 
(’.()- 
at 
labora¬ 
tory 
7th 
Jlay 13th, '07 
O-OGO rotl 
- 
30 Large Trees 
Tapped in the ordinary native manner, Deeemlier 15th. lOlKi 
7G9 
1st 
Jan. 17th, '07 
0.2.33 rotl 
2-5.5 
.3-20 
i\)py 
- 
770 
2iid 
Feb. 4th. '07 
0-53 rotl 
■2-74 
3-10 
.38-7 
G3-0 
771 
.3rd 
Fell. 15tli, ’07 
0-283 rotl 
Approximately the same 
•2-,55 
2-81 
37-0 
G2-8 
772 
4th 
^lar. Hth. '07 
0.233 rotl 
as that from middle- 
2-.35 
•2-9-2 
4(1-5 
03-0 
773 
.5th 
Mar. 22nd. '07 
0-300 rotl 
sized trees 
2.35 
.3-01 
34-5 
0-2-3 
885 
Not 
Gth 
Apr. 7th, ’07 
0-192 rotl 
•2-lG 
2-74 
2G-9 
G(i-7 
at 
labora¬ 
tory. 
7th 
May 13th, ’07 
0-133 rotl 
