Snap! Except my father still has his.I was looking for something else in the shed today, when I came across my dads old tape measure, which might be interesting here.
He was an architect, and I remember, as a boy, he would ask me to hld the toggled end in position so he could mesure something. Anyway, its a bit of an antique, so I also considered posting this in the old tech thread.
Here is the thing wound up. Its exactly 11cm wide and an inch deep.
View attachment 109701
The tape itself is calibrated on the main face in feet and inches
View attachment 109702
And on the reverse are alternative imperial measurements
The link
View attachment 109703
which is just under 8 inches.
And the pole which is also called a rod
View attachment 109704
Which is equal to 25 links, also equal to 5 1/2 yards or 78 inches.
This becomes more reasonable when you start from the top end and work down.
1 mile is 8 furlongs
1 furlong is 10 chains
1 chain is 4 poles
1 pole is 25 links
and one link is 7.92 inches.
Once more a wide variety of bases (8,10,4,25 and 7.92) just to keep things simple.
The tape measure itself is 50 feet long, or just over 3 poles.
I think my father only ever used the feet and inches side himself.
Also snap.I was looking for something else in the shed today, when I came across my dads old tape measure, which might be interesting here.
He was an architect, and I remember, as a boy, he would ask me to hld the toggled end in position so he could mesure something. Anyway, its a bit of an antique, so I also considered posting this in the old tech thread.
Here is the thing wound up. Its exactly 11cm wide and an inch deep.
View attachment 109701
The tape itself is calibrated on the main face in feet and inches
View attachment 109702
And on the reverse are alternative imperial measurements
The link
View attachment 109703
which is just under 8 inches.
And the pole which is also called a rod
View attachment 109704
Which is equal to 25 links, also equal to 5 1/2 yards or 78 inches.
This becomes more reasonable when you start from the top end and work down.
1 mile is 8 furlongs
1 furlong is 10 chains
1 chain is 4 poles
1 pole is 25 links
and one link is 7.92 inches.
Once more a wide variety of bases (8,10,4,25 and 7.92) just to keep things simple.
The tape measure itself is 50 feet long, or just over 3 poles.
I think my father only ever used the feet and inches side himself.
Interesting topic, Of course one of the first known mathematical systems - that of Sumerians/Babylonians used a system that had 12 in it - namely a sexagecimal one (technically that's having it base 60, but that's 5 times 12. If that sounds awkward, it is really quite easy to count to 60 using your fingers: Take your left hand as the 'counting hand' and your right as the 'marking hand'. The left hand thumb does the counting and you use thumb to count the knuckles of the remaining four fingers. When you reach 12, mark one on your right hand. Repeat 5 times and you get to 60!)Only just noticed this thread (not very observant me!) and it's an area that's always fascinated me. I have often considered that base 12 maths would have been far superior to base ten so long as your numbering system is also base 12. However I have also considered what could have been a downside to such a system. Base ten is very difficult to divide making fractions and, eventually, decimal numbers pretty much essential to do anything but the simplest of mathematics. However if we had had a number system in base 10, it is conceivable that it might have significantly delayed the development of more advanced mathematics simply because the idea of fractions would have been much less essential. We can never know but it's quite possible.
I didn't quite follow this statement. Is the reference to base 10 a typo?However if we had had a number system in base 10, it is conceivable that it might have significantly delayed the development of more advanced mathematics simply because the idea of fractions would have been much less essential.
You're absolutely right! My apologies and it's too late for me to edit it it should have been:I didn't quite follow this statement. Is the reference to base 10 a typo?
The average 12 year old boy is about 4′11″. The average 12 year old girl is about 5′0″. The average height for an American male in 5th Grade is about 56 inches, while for females the same nationality and grade is about 57 inches. So, the average height would be 56.5 inches.