Ancient Roman Pedometer Called a Hodometer

While I was looking for the history of pedometers on the web I came across this illustration of a device used by the Romans.

Here is a closeup:

A description on how it worked:

A gear with one tooth (A) fastened to the wheel

of the cart turned a larger wheel (B) with 399

short teeth and one long tooth (C). The tooth

turned the drum (D) with teeth and holes for

pebbles. As the drum was turned, a rounded

pebble would fall into the metal bowl (E),

indicating that the cart had traveled one Roman


I lost the link to this site but here's a link with more information:

1 comment:

  1. Oregano іs a perennial herb whiсh means it will
    come bacκ yеar after year, and can get out οf cοntrol if not proρeгly
    contаineԁ. Peter Ρipег Ρizza Coupοns-Pеter Piper Pіzza Coupons:Peter Piper Pizza can be a familу pizza chain operating 45 cοmpаny
    restaurаnts and 60 franchises inside the U.
    There are not a lot of frоzen рizzas out thеre that lock in thаt fresh
    takе out taste anԁ Ι wanted to see what thіs pіzza сould offer me.

    My wеb site


I enjoy reading your comments.
I'll visit your blog.


Recent Posts Widget