Joseph Barbow.

Barbow's booklet on tree scale and section diagram : useful to timber estimators, timber owners, and compass men online

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BARBOW'S




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Barbow's Mirror Cruising- Compass.



-'



t -

BARBOWS
BOOKLET



Tree Scale and
Section Diagram

USEFUL TO

Timber Estimators
Timber Owners
and Compass Men



"Let things that have to be done be
learned by doing them"



Copyright 1909

By JOSEPH BARBOW

Portland, Oregon



PREFACE



- >*

GOOD AUTHORITIES claim
that a precise rule to scale
standing timber is most diffi-
cult to be arrived at; indeed,
we believe it. My method is
merely to arrive at the next
best.

The author's desire is merely
to place before the intelligent
beginner and the old woods-
men condensed information
which he sincerely hopes will
be found of value.

Joszrn BARBOW,

PORTLAND, OREGON



Jv.




! ! ; '!l heiqttt. 13. loqs
5 Staff. .44- =60"

= ,32 4-00' B.M~-
.jjvi-irl *9 ft F Af >37



Barbow's Mirror Cruising Compass

Includes elements to facilitate compassing.
Also a simple device, comprising, an indi-
cator, a log division, a reading mirror, a pair
of sights, and a folding scale. For the pur-
poses of determining the number of logs in a
tree, and its diameter at the point of mean
height,

First Observation. Pace out 18 paces, or
measure 96 feet from the base of the tree. At
this point hold up compass box vertically
and sight along the upper edge to top of tree,
and note the number of 16-feet logs indi-
cated in mirror.

Second Observation. Standing at the same
point, sight between the pair of sights, to
point of mean height on the tree, at the same
time holding knot on cord at the eye (the eye
is now equal to 12 inches from the sights.)
(having previously opened the folding scale
which now rests on partly closed cover.)
Carefully sight and continue to close cover until
each sight coincides with the width of the
tree. This having been done carefully, read
the scale which is divided in one hundredths
of an inch, to correspond with the width of
the tree in inches, when the reading on scale
is .40, the tree is 40 inches diameter, if .55,
the tree is 55 inches diameter, etc.

NOTE This scale corresponding with the
width of the tree will be found precise enough
for all trees containing no more than four
logs.

And all trees above four logs one may trace
its diameter by consulting "Tree Scale in
Booklet."

First Example. One finds the tree to
contain 5 logs, and the reading of the "Scale"
to be .38. See Page 13, find 5 logs line, then



.38 stands under the head of 40 inches
diameter. Amount in feet, 5950. Size of
timber, .84 log per thousand feet.

Second Example. One finds the tree to
contain 12 logs, and the reading of scale .55
See page 20, in the same manner find 12 logs
line, then .55 under the head of 75 inches
diameter, amount in feet 51600. Size of
timber .23 log per thousand feet, etc.

Remark First. Ascertain diameter at the
point of mean height on the tree, and deduct
the bark.

(Except in case of one log tree, when
diameter of top end should be used.)

Remark Second. There may be found cases
when the woodsman may find it advis-
able to deduct 1 and even 2 inches, as well
as the bark from the ascertained diameter.
For instance, when a tree is both small and
short, another, may be large but short, de-
duct 1 and 2 inches, respectively.

NOTE Remark 2nd applies to contents
of trees in feet only.

Remark Third. To contents of cordwood
given add 1 to 10% for close to loose piling
respectively, as well as retaining the bark;
add tops if used.

Remark Fourth. Number of Ties is
approximated .

Remark Fifth. The contents given in
feet for each tree is based on Spaulding Log
Rule.



First ColumnNumber of 16 feet logs in the tree

Second Column Diameter of tree, in bold

face figures, at mean height, with reading

of Folding Scale in inches, and hundredths

underneath it.

Third Column Number of feet B. M. in the
123 4 52345



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10.00







tree, with number of logs per M., given

in logs and hundred ths, underneath it.
Fourth Column Number of cords of wood

in the tree, given in cords and hundredths.
Fifth Column Number of ties in tree, tie

7 by 9 inches, and 8 feet long.
123 4523 45



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1.60


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1.53


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1900


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2090


2.75


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12


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1920


2.64


48


.12


2280


3.00


48






6.25








5.26







First ColumnNumber of 16 feet logs in the tree

Second Column Diameter of tree, in bold

face figures, at mean height, with reading

of Folding Scale in inches, and hundredths

underneath it.

Third Column Number of feet B. M. in the
1234523 45



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500


.62


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3


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660


.84


12


.19


750


.93


18


4


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880


1.12


16


.19


1000


1.24


24


5


.17


1100


1.40


20


.18


1250


1.55


30


6


.17


1320


1.68


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.18


1500


1.86


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7


.16


1540


1.96


28


.17


1750


2.17


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.16


1760


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.17


2000


2.48


48


9


.15


1980


2.52


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2250


2.79


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10


.14


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2.80


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2500


3.10


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11


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2420


3.08


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2750


3.41


66


12


.13


2640


3.36


48


14


3000


3.72


72






4.55








4.00







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.70


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620


.76


16


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840


1.05


18


.21


930


1.14


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4


.20


1120


1.40


24


.21


1240


1.52


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5


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1.75


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.20


1550


1.90


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6


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1680


2.10


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.20


1860


2.28


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7


.18


1960


2.45


42


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2170


2.66


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2240


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3.04


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2520


3.15


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2790


3.42


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10


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2800


3.50


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3.80


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3.85


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3410


4.18


88


12


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3360


4.20


72


.15


3720


4.56


96






3.57








3.23







tree with number of logs per M., given

in logs and hundredths, underneath it.
Fourth Column Number of cords of wood

in the tree, given in cords and hundredths.
Fifth Column Number of ties in tree, tie,

7 by 9 inches, and 8 feet long.
1234523 45



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Dia
23


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.22


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.42


8


.23


380


.46


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680


.84


16


.23


760


.92


16


.22


1020


1.26


24


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1140


1.38


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.22


1360


1.68


32


.23


1520


1.84


32


.21


1700


2.10


40


.22


1900


2.30


40


.21


2040


2.52


48


.21


2280


2.76


48


.20


2380


2.94


56


.21


2660


3.22


56


.19


2720


3.36


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3040


3.68


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3060


3.78


72


.19


3420


4.14


72


.18


3400


4.20


80


.18


3800


4.60


80


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3740


4.62


88


.18


4180


5.06


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.16


4080


5.04


96


.17


4560


5.52


96




2.94








2.63







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1.08


20


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1.50


30


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1350


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30


.24


1640


2.00


40


.25


1800


2.16


40


.23


2050


2.50


50


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2250


2.70


50


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2460


3.00


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.23


2700


3.24


60


.22


2870


3.50


70


.23


3150


3.78


70


.21


3280


4.00


80


.22


3600


4.32


80


.20


3690


4.50


90


.21


4050


4.86


90


.19


4100


5.00


100


.20


4500


5.40


100


.18


4510


5.50


1.10


.1.9


4950


5.94


110


.18


4920


6.00


120


.18


5400


6.48


120




2.44








2.22







First Column N umber of 16 feet logs in the tree

Second Column Diameter of tree, in bold

face figures, at mean height, with reading

of Folding Scale in inches, and hundredths

underneath it.

Third Column Number of feet B. M. in the
123 4523 45



g




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.63


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2


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1.18


20


.27


1060


1.26


24


3


.26


1470


1.77


30


.27


1590


1.89


36


4


.26


1960


2.36


40


.27


2120


2.52


48


5


.25


2450


2.95


50


.26


2650


3.15


60


6


.24


2940


3.54


60


.25


3180


3.78


72


7


.23


3430


4.13


70


.24


3710


4.41


84


8


.23


3920


4.72


80


.23


4240


5.04


96


9


.22


4410


5.31


90


.22


4770


5.67


108


10


.21


4900


5.90


100


.22


5300


6.30


120


11


.20


5390


6.49


110


.21


5830


6.93


132


12


.19


5880


7.08


120


.20


6360


7.56


144






2.04








1.89








1


Dia


1


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o


S


Dia


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g


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28


fe








29


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H


1


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570


.68


12


.29


610


.73


12


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1140


1.36


24


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1220


1.46


24


3


.28


1710


2.04


36


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1830


2.19


36


4


.28


2280 j 2.72


48


.29


2440


2.92


48


5


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28501 3.40


60


.28


3050


3.65


60


6


.26


3420


4.08


72


.27


3660


4.38


72


7


.25


3990


4.76


84


.26


4270


5.11


84


8


.24


4560


5.44


96


.25


4880


5.84


96


9


.23


5130


6.12


108


.24


5490


6.57


108


10


.22


5700


6.80


120


.23


6100


7.30


120


11


.22


6270


7.48


132


.22


6710


8.03


132


12


.21


6840


8.16


144


.21


7320


8.76


144






1.75








1.64







10



tree, with number of logs per M., given

in logs and hundredths, underneath it.
Fourth Column Number of cords of wood

in the tree, given in cords and hundredths.
Fifth Column Number of ties in tree, tie

7 by 9 inches, and 8 feet long.
123452345



Dia
30


1


1


1


Dia
31


1
1


1


1


.30


660


.78


14


.31


700


.83


14


.30


1320


1.56


28


.31


1400


1.66


28


.30


1980


2.34


42


.31


2100


2.49


42


.30


2640


3.12


56


.31


2800


3.32


56


.29


3300


3.90


70


.30


3500


4.15


70


.28


3960


4.68


84


.29


4200


4.98


84


.27


4620


5.46


98


.28


4900


5.81


98


.26


5280


6.24


112


.27


5600


6.64


112


.25


5940


7.02


126


.26


6300


7.47


126


.24


6600


7.80


140


.25


7000


8.30


140


.23


7260


8.58


154


.24


7700


9.13


154


.22


7920


9.36


168


.23


8400


9.96


168




1.52








1.43







|


Dia
32


I


I



P


Dia
33


1


3

a


1

H


1


.32


750


.89


16


.33


800


.95


20


2


.32


1500


1.78


32


.33


1600


1.90


40


3


.32


2250


2.67


48


.33


2400


2.85


60


4


.32


3000


3.56


64


.33


3200


3.80


80


5


.31


3750


4.45


80


.32


4000


4.75


100


6


.30


4500


5.34


96


.31


4800


5.70


120


7


.29


5250


6.23


112


.30


5600


6.65


140


8


.28


6000


7.12


128


.29


6400


7.60


160


9


.27


6750


8.01


144


.27


7200


8.55


180


10


.26


7500


8.90


160


.26


8000


9.50


200


11


.25


8250


9.79


176


.25


8800


10.45


220


12


.24


9000


10.68


192


.24


9600


11.40


240






1 .33








1.25







11



First Column Number of 16 feet logs in the tree

Second Column Diameter of tree, in bold

face figures, at mean height, with reading

of Folding Scale in inches, and hundredths

underneath it.

Third Column Number of feet B. M. in the





TO

1


Dia
34


1
E*


1


.8


Dia
35


I

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3


.8


1


.34


850


1.00


20


.35


900


1.06


24


2


.34


1700


2.00


40


.35


1800


2.12


48


3


.34


2550


3.00


60


.35


2700


3,18


72


4


.34


3400


4.00


80


.35


3600


4.24


96


5


.33


4250


5.00


100


.34


4500


5.30


120


6


.32


5100


6.00


120


.33


5400


6.36


144


7


.31


5950


7.00


140


.32


6300


7.42


168


8


.30


6800


8.00


160


.30


7200


8.48


192


9


.28


7650


9.00


180


.29


8100


9.54


216


10


.27


8500


10.00


200


.28


9000


10.60


240


11


.26


9350


11.00


220


.27


9900


11.66


264


12


.25


10200


12.00


240


.26


10800


12.72


288






1.18








1.11








1


Dia


1


n


8


Dia


i


g


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2


36




6


EH


37




3




i


.36


950


1.12


24


.37


1010


1.19


28


2


.36


1900


2.25


48


.37


2020


2.38


56


3


.36


2850


3.37


72


.37


3030


3.57


84


4


.36


3800


4.50


96


.37


4040


4.76


112


5


.35


4750


5.62


120


.36


5050


5.95


140


6


.34


5700


6.75


144


.35


6060


7.14


168


7


.32


6650


7.87


168


.33


7070


8.33


196


8


.31


7600


9.00


192


.32


8080


9.52


224


9


.30


8550


10.12


216


.31


9090


10.71


252


10


.29


9500


11.25


240


.30


10100


11.90


280


11


.28


10450


12.37


264


.28


11110


13.09


308


12


.26


11400


13.50


288


.27


12120


14.28


336






1.05








1.00







12



tree with number of logs per M., given

in logs and hundredths, underneath it.
Fourth Column Number of cords of wood

in the tree, given in cords and hundredths.
Fifth Column Number of ties in tree, tie

7 by 9 inches, and 8 feet long.
123 4523 45



bil


Dia


1


t


s


Dia




TJ
g


8


2


38


hi


8


EH


39


Feet


o


H


1


.38


1060


1.25


28


.39


1120


1.32


28


2


.38


2120


2.50


56


.39


2240


2.64


56


3


.38


3180


3.75


84


.39


3360


3.96


84


4


.38


4240


5.00


112


.39


4480


5.28


112


5


.37


5300


6.25


140


.37


5600


6.60


140


6


.35


6360


7.50


168


.36


6720


7.92


168


7


.34


7420


8.75


196


.35


7840


9.24


196


8


.33


8480


10.00


224


.34


8960


10.56


224


9


.32


9540


11.25


252


.32


10080


11.88


252


10


.30


10600


12.50


280


.31


11200


13.20


280


11


.29


11660


13.75


308


.30


12320


14.52


308


12


.28


12720


15.00


336


.29


13440


15.84


336






.94








.89







Dia
40


1




1


.8


Dia
41


1


8


2


.40


1190


1.39


28


.41


1250


1.46


32


.40


2380


2.78


56


.41


2500


2.92


64


.40


3570


4.17


84


.41


3750


4.38


96


.40


4760


5.56


112


.41


5000


5.84


128


.38


5950


6.95


140


.39


6250


7.30


160


.37


7140


8.34


168


.38


7500


8.76


192


.36


8330


9.73


196


.37


8750


10.22


224


.35


9520


11.12


224


.36


10000


11.68


256


.33


10710


12.51


252


.34


11250


13.14


288


.32


11900


13.90


280


.33


12500


14.60


320


.31


13090


15.29


308


.32


13750


16.06


352


.29


14280


16.68


336


.30


15000


17.52


384




.84








.80







13



First Column Number of 1 6 feet logs in the tree

Second Column Diameter of tree, in bold

face figures, at mean height, with reading

of Folding Scale in inches, and hundredths

underneath it.

Third Column Number of feet B. M. in the
123 452345



1


Dia


1


|


s


Dia


o>


2


j


>3


42





6


P


43





6


P


i


.42


1310


1.53


32


.43


1380


1.60


32


2


.42


2620


3.06


64


.43


2760


3.20


64


3


.42


3930


4.59


96


.43


4140


4.80


96


4


.42


5240


6.12


128


.43


5520


6.40


128


5


.40


6550


7.65


160


.41


6900


8.00


160


6


.39


7860


9.18


192


.40


8280


9.60


192


7


.38


9170


10.71


224


.39


9660


11.20


224


8


.37


10480


12.24


256


.37


11040


12.80


256


9


.35


11790


13.77


288


.36


12420


14.40


288


10


.34


13100


15.30


320


.34


13800


16.00


320


11


.32


14410


16.83


352


.33


15180


17.60


352


12


.31


15720


18.36


384


.32


16560


19.20


384






.76








.72







05
%


Dia


I


1


8


Dia


1


1


1


2


44


5





H


45


6t


5


P


1


.44


1450


1.68


36


.45


1510


1.76


36


2


.44


2900


3.36


72


.45


3020


3.52


72


3


.44


4350


5.04


108


.45


4530


5.28


108


4


.44


5800


6.72


144


.45


6040


7.04


144


5


.42


7250! 8.40


180


.43


7550


8.80


180


6


.41


8700


10.08


216


.42


9060


10.56


216


7


.40


10150


11.76


252


.41


10570


12.32


252


8


.38


11600


13.44


288


.39


12080


14.08


288


9


.37


13050


15.12


324


.37


13590


15.84


324


10


.35


14500


16.80


360


.36


15100


17.60


360


11


.34


15950


18.48


396


.35


16610


19.36


396


12


.32


17400


20.16


432


.33


18120


21.12


432






.69








.66


1



14



tree, with number of logs per M., given

in logs and hundredths, underneath it.
Fourth Column Number of cords of wood

in the tree, given in cords and hundredths.
Fifth Column Number of ties in tree, tie

7 by 9 inches, and 8 feet long.
123 4523 45



w.


Oh


1


|


1


Din


I


n


B


3


46


&


O


H


47





a


H


1


.46


1580


1.84


36


.47


1650


1.92


36


2


.46


3160


3.68


72


.47


3300


3.84


72


3


.46


4740


5.52


108


.47


4950


5.76


108


4


.46


6320


7.36


144


.47


6600


7.68


144


6


.44


7900


9.20


180


.45


8250


9.60


180


6


.43


9480


11.04


216


.44


9900


11.52


216


7


.41


11060


12.88


252


.42


11550


13.44


252


8


.40


12640


14.72


288


.41


13200


15.36


288


9


.38


14220


16.56


324


.39


14850


17.28


324


10


.37


15800


18.40


360


.38


16500


19.20


360


11


.35


17380


20.24


396


.36


18150


21.12


396


12


.34


18960


22.08


432


.35


19800


23.04


432






.63








.61







1


Dia




1


VI
0>


Dia


I


|


i


3


48



|


5


H


49


fe





H


i


.48


1720


2.00


40


.49


1800


2.08


40


2


.48


3440


4.00


80


.49


3600


4.16


80


3


.48


5160


6.00


120


.49


5400


6.24


120


4


.48


6880


8.00


160


.49


7200


8.32


160


5


.46


8600


10.00


200


.47


9000


10.40


200


6


.45


10320


12.00


240


.46


10800


12.48


240


7


.43


12040


14.00


280


.44


12600


14.56


280


8


.42


13760


16.00


320


.43


14400


16.64


320


9


.40


15480


18.00


360


.41


16200


18.72


360


10


.38


17200


20.00


400


.39


18000


20.80


400


11


.37


18920


22.00


440


.38


19800


22.88


440


12


.35


20640


24.00


480


.36


21600


24.96


480






.58








.56







First Column Number of 16 feet logs in the tree
Second Column Diameter of tree, in bold

face figures, at mean height, with reading

of Folding Scale in inches, and hundredths

underneath it.
Third Column Number of feet B. M. in the

tree, with number of logs per M., given

in logs and hundredths, underneath it.
Fourth Column Number of cords of wood

in the tree, given in cords and hundredths.
Fifth Column Number of ties in tree, tie

7 by 9 inches, and 8 feet long.
123 45



1


Dia
50


I


1


1




1


.50


1870


2.17


44




2


.50


3740


4.34


88




3


.50


5610


6.51


132




4


.50


7480


8.68


176




5


.48


9350


10.85


220




6


.47


11220


13.02


264




7


.45


13090


15.19


308




8


.43


14960


17.36


352




9


.42


16830


19.53


396




10


.40


18700


21.70


440




11


.38


20570


23.87


484




12


.37


22440


26.04


528








.53









1C



it Column Number of 16 feet logs in the tree
Second Column Diameter of tree, in bold
face figures, at mean height, with reading
of Folding Scale in inches, and hundredths
underneath it.

Third Column Number of feet B. M. in the
tree, with number of logs per M., given
in logs and hundredths, underneath it.
12 32 32 3 2 3



Si


Dia





Dia


$


Dia


0>


Dia


1


5


51


fe


52





53





54


fe


i


.51


1950


.52


2030


.53


2100


.54


2180


2


.51


3900


.52


4060


.53


4200


.54


4360


3


.51


5850


.52


6090


.53


6300


.54


6540


4


.51


7800


.52


8120


.53


8400


.54


8720


5


.49


9750


.50


10150


1 3

Online LibraryJoseph BarbowBarbow's booklet on tree scale and section diagram : useful to timber estimators, timber owners, and compass men → online text (page 1 of 3)