McKenna Process Company
Plant formerly located in Joliet, Illinois - ca. 1920.
Autobiographical Data
The Minooka Mastodons - 1911-1912 ... and 1919
by George Langford, Sr.

This year (2007) George, III found a Debit/Credit book that had been discarded by the McKenna company after making some entries between August 17, 1897, and June 30, 1898.  Evidently, they found a more efficient way of keeping track of cash flow ... there are only some twenty handwritten lines.  George, Sr. then used the book as his catalogue of specimens collected, starting with the Minooka mastodons. The catalog entries end on August 19, 1919.  That precipitous curtailment may have taken place when George, Sr. finally sold the bones to the Field Museum.

What follows here is my transcript of George, Sr.'s catalogue of Minooka, Illinois, mastodon specimens that he collected and conserved.


Period
Location
Species
Pages
Upper Pleistocene Minooka, Illinois
M. Americanus 6-15

Parts of Head (pg.6)

Age
Code Description
Adult
Oc1
Posterior part head - including occipital, condyles & part parietal
Young
Oc5
Posterior part head - including 1/2 occipital, condyles, basis phenoid & part parietal

Jaws and Teeth Representing 11 Individuals (pp. 6 & 7)

Tooth measurements (in inches); see Figure 1.


Age
Code
Description
Notes
Teeth
Present
Teeth
Missing
Total
Teeth
1st
X
1st
Y
1st
Crests
2nd
X
2nd
Y
2nd
Crests
3rd
X
3rd
Y
3rd
Crests
Adult (?)
LMx1
Right maxillary

2
0
2


none


3


4+
Adult (?)
RM1
Right lower jaw, lacking chin and post. ramus & condyle
}Restored together
2
0
2


none


3
7-3/4
4-1/2
4+
Adult (?)
LM1
Left lower jaw, lacking chin and post. ramus & condyle }in anterior part
2
0
2


none


3


4+
Adult (?)
LMx2
Right maxillary lacking upper part







4-1/2
3-5/8
3
6-7/8

4
Adult (?) RM2
Right lower jaw, post. ramus and candyle only













Adult (?) LM2
Left lower jaw, complete
See Figure 2
for dimensions
2
0
2





3


4+
Adult
LMx6
Fragment left maxillary
See Figure 3
for side view
2


3-1/2
2-7/8
3
4-1/2
3-1/4
3



Medium
RM4
Right lower jaw, middle part only

2
1
3



4
2-7/8
3
5-1/8
3-1/2
3
Medium LM4
Left lower jaw, anterior part only with fragment more posterior

1
2
3



4
2-7/8
3



Medium LMx4
Fragment left maxillary

1
2
3



4
2-7/8
3



Medium RMx4
Fragment right maxillary
1
2
3





3



Young
RMx5
Fragment right maxillary
3
0
3
2-7/8
2-1/8
3
3-5/8
2-1/2
3
4-1/4
3-1/4
3
Young LMx5
Left maxillary

3
0
3


3


3


3
Young LM5
Part middle part, lower jaw

2
1
3





3


3
Young RM5
Part middle part, lower jaw
3
0
3


3


3


3
Younger
LM3
Left lower jaw, lacking chin, post. ramus & candyle
}Restored together 3
0
3
1-3/4
1-1/2
2
3-1/4
2-1/4
3
4
2-3/4
3
Younger RM3
Right lower jaw, lacking chin, post. ramus & candyle }in anterior part




2


3


3
Youngest
RM7
Right lower jaw, fragment

2
1
3
1-3/8
1-1/4
2+
2-1/8
1-3/4
3+



Youngest LM8
Left lower jaw, fragment smaller than RM7

1
2
3



1-7/8
1-5/8
3+





One molar tooth, 3-3/4 by 3















One molar tooth, 3-1/2 by 2-1/8















Key to dimensional measurements:Measurements of tusks of Minooka mastodons




Tusks
(pg. 8)

Age
Code
Description
A dimension
B dimension C dimension D dimension
Adult
LT1
Tusk complete
8 ft. 10 in.
19-1/2 in.
21-1/2 in.
5 ft.
Adult RT1
Tusk posterior end




Adult (?) T3
Tusk posterior end 2 ft. 6 in.
20 in.


Adult (?) T2
Tusk posterior middle part
3 ft. 8 in.

21 in.

Young
T4
Tusk nearly complete except near tip
5 ft.

13 in.

Young T4
Tusk posterior end 2 ft. 6 in.
12 in.


Young T5
Tusk anterior end
2 ft. 1 in.



Younger T6
Tusk anterior end 1 ft. 4 in.

 8 in. (one ft. from tip)

Young T5
Tusk part anterior end 1 ft. 3 in.



Young T5
Tusk part anterior end



Young T5
Tusk part anterior end





Key to dimensional measurements:
Atlas vertebra measurements Axis  vertebra measurements
Third  vertebra measurements
Dorsal  vertebra measurements
Cervical last  vertebra measurements




Vertebrae
(pg. 9)

Age
Type
A dimension
in inches
B dimension
in inches
C dimension
in inches
Adult
Atlas
10
10-1/8

Adult Axis
8-3/4
12

Adult 3rd
6-1/2
10-1/2

Adult Cervical last
12
14
13
Adult Dorsal 4th

23

Besides the above are 12 vertebrae dorsal & lumbar of adult and 8 dorsal & lumbar vertebrae of younger mastodons.

           Scapula Representing 4 Individuals (pp. 10 & 11)
Key to dimensional measurements
(in inches)




Age
Code
Description
A dimension
B dimension
C dimension
Adult
RS2
Lacking lateral blades
8
9-3/4
28+
Adult RS3
Lacking lateral blades and part articular 8

28+
Adult LS3
Lacking lateral blades and upper end 8
10

Adult RS1
Lacking lateral blades and upper end 8-1/2
11

Young
RS4
Lacking lateral blades and upper end
6


Scapula dimesnions - Minooka mastodon

           Humerus Representing 5 Individuals (pp. 10 & 11)

Key to dimensional measurements
(in inches)



Age
Code
Description
A
B
C
D
E
X
Y
Adult
LH1
Left, complete







Adult RH1
Right, complete
36
37-3/4
9
14
10-1/2
28
9-3/4
Adult LH2
Left, upper end missing







Adult RH2
Right, complete
34
36
8-1/2
12-1/2
10-1/4
25
9-3/4
Young
RH4
Both ends missing





23
8-1/4
Young RH5
Both ends missing




20-1/2
7-1/2
Adult LH3
Shaft & upper articular, 2 pieces






9-3/4+
Adult RH3
Fragment of shaft








Humerous sketch for dimensional measurements
     
                Ulna Representing 2 Individuals (pp. 10 & 11)
Key to dimensional measurements
(in inches)



Age
Code
Description
A
B
C
D
Adult
RU1
Olecranon missing & restored
25-5/8
9
32
7-1/4
Adult LU1
Lower end restored




Young
LU2
Olecranon missing 19-1/2
7
23-1/2
5-1/2

Ulna - dimensional sketch

          Radius Representing 2 Individuals (pp. 10 & 11)
Key to dimensional measurements
(in inches)


Age
Code
Description
A
B
C
D
Adult
RR1
Right, complete
26
27-1/4
7
4-3/4
Adult LR1
Right, partly restored both ends




Adult RR2
Right, complete 24-1/2
25-3/4
6-1/2
4-1/2

Sketch of Radius bone of a Minooka mastodon

          Pelvis Representing 1 Individual (pp. 12 & 13)

Age
Code
Description
Diameter of Acetabulum
Adult
LO1
Os innominatum, iliac border missing
7+ inches

          Femur Representing 7 Individuals
(pp. 12 & 13)

Key to dimensional measurements
(in inches)
A & G  are circumferences
E is a diameter

Age
Code
Description
A
B
C
D
E
F
G
H
X
Adult
LF1
Half of lower end missing









Adult RF1
Partly restored
17-1/2
40
41
10-1/2