03. Gunter’s Chain – a legacy of three centuries

Imagine designing something that would be used for three centuries. That is what Edmund Gunter...

02. Circumferentors – Made in Canada before Confederation

Circumferentors were used to survey Canadian settlements and international boundaries during the 1800s. They were...

01. Sextant and Artificial Horizon

Sextants, developed in the 17th Century were used until the 20th Century to determine the...