gc 
is.adapted to-their wants. The first ta- 
ble shews, every fourth year, from 12 to. 
100; the rates per cent. perann, at which 
all txees increase, whether they graw fast 
or slow, provided their ‘rate of growth 
does not vary. ' 
This table. may be the means of saving 
young thriving woods from being cut. 
down, by shewing how great a loss 1s sus- 
tained by felling timber prematurely ; and 
it will poimt out the small interest which 
old trees will bring by being kept: it will 
Jikewise assist in the valuing of such tim- 
ber as is not to be cut down, by enabling . 
Préceédings of Learned Societies. 
a uly It 
a person to estimate its present value, es- 
pecially when it is. encreasing after a high 
, rate per cent per ann. 
The second table shews the rate per 
cent. to be the same as in the first table, 
_ though the annual increase is more both 
in heightand circumference. It must be 
observed that the whole height of the 
trees is taken to the top of the leading 
shoot, and the girt in the middle. 
Tf trees increase 12 mches in height, 
and Lin circumference anuually, their in- 
crease will be as in the following 
Ta Bl, Be kk 
Contents. 
Years ola 
& ft. high 
; — S —, = 
apie 
. |Rate pei 
' 
Sid dead 
One Year's in-} we: or 
a ae increase. 
ft. in, pts . In. pt. sds. in, pt. 
Oe Sh) AS dee, O.. 8 10 23-4 0. Foe 
BAO yb, ~ 4°) TF a (Ol. 0) - ANNO 1.0) hlOge 
ai) 0 10 5/21) 28.1 0-0 8/01. 7 8 
4 jas G6.) Oo Sis 4/8 1 Pee ae 
BH 2a 0) 20) BE 27 10.4 Ola, Bw 
4008 460.8038 OAS. 8.10090 @hO04, 448 
45. 0 O41 804) 48). 555 1h, 6}|) 0 a OS 
Bil © AL 444245 7.5 8 10) 058 480 
51) 9 2 11145] 53° 910 7 9}0-7 8.9 
“@ 741g- 0 * OF 404 62) 12), Ow Rs 1 Or eg 
61/15 3° 0153 | 63 16 110 2/01010 2 
Pq Oe BRN Fa 20) Pdi aa dO eee 
71/238 5) 2161) 7% 24 7 6.511 2:4 6 
et2s 2 4168 | B64:29 9 fT O1464:a 0 
$1134 12 4/69) 88 35 7 84111 6 441 
9° 440° 5 OF} 73 | “OM 42 2.6) 44 be BEN 
AG 9% 9 GOL G7 1 OR 495-6. 65 2 1.4044.2 
55°. 6, 8/81 108") 5% 7 42,94 2 1309 
G4 BBN BF POs. OB get 8 ee Bead Se 
1S 920 400 BOef 448s 76.5 744-5112 He 
64) SOT O8-P44g) BTL Be Oe. Oe r 
196 OD Of 97:'1:924) 99.0 4 653 O14 6 : 
ran | 1oa}ie 6°O 49011998) 1115 ©. 68) 3.3 eis 3 
The increase per cent. per annum is 
the same as the above in all trees at the 
same age, whether they have grown 
faster or slower, provided their increase 
in height and thickpess annually has. not 
' varied on au average. 
trees is sometimes greatly retarded by 
insects destroying their leaves, by unfa- 
vourable seasons, ani] by their roots pe- 
netrating into noxious strata. "But these 
accidents cannot enter into calculations. 
Culculations, shewing every fourth year 
"from 1% to 64, the progressive annual 
The progress of 
increase in the growth of trees, and the 
gradual decrease in the rate per cent. 
per annum, that the annual increase 
bears to the whole tree. ‘ 
| The whole height of the trees is taken 
to the top of the leading shoot, and the 
girt in the middle; but no account is 
taken of the lateral branches. 
If trees increase eighteen inches in 
height, and two inches in circumference, 
annually, their increase will be as un- 
dermentioned, Vize 2 
TABLE 
