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The sonar was a method for locating underwater objects using the reflection of sound waves. The sonar was developed to help the navy with detecting underwater obstacles such as icebergs, submarines and sometimes land mines. It was also used to detect the depth of the waters.

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In WWI, mortars were seen as great options due to the terrain of the trenches and how they shoot at a high angle. In August of 1915, the minister of militia and defence, Sir Sam Hughes told the Canadian government a strategy to make mortars more mobile, by putting them on armored wagons.

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The Lewis Light Machine gun is a modified version of the American “Lewis Gun.” As the name says, the Lewis LMG was designed to be as light as possible, making it very mobile in war and giving Canada the upper hand in WWI.  Things that made the gun light include 47 round mags instead of 97, and the magazine was a rotating disc instead of a belt of bullets.

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The Ontario Hydros Queenston-Chippawa Hydroelectricity Power Generator was a massive project in Canada that took nearly five years to complete. Construction was complicated in many ways, and shovel machinery had to be redesigned in order to complete the task. Eventually in 1922, the first generator was put into use and started supplying electricity across Ontario.

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Joseph Armand Bombardier was a mechanic from Quebec, and he created the first prototype of a “snowmobile” in 1922. It used a propeller and was the first vehicle that could quickly and easily travel through snow. Many improved versions of the snowmobile were later created by others, but Joseph had made the first.

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The variable pitch propeller is a device that can adjust the angle in which the propeller blades cut the air, mid flight. When it was created, it became an essential for all air vehicles, as it made them more safe and efficient.

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The discovery of insulin saved millions of lives from diabetes. It was discovered by Frederick Banting, Charles Herbert Best, John James Macleod and James Collip. They found that extracting cells from cows and pigs pancreases produced insulin.

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Before 1925, all radios were powered with batteries, until Edward Rogers came up with an alternating-current radio wire that could power radios and fix the problem of battery powered radios; The battery powered radios used a direct current to receive power, rather than an alternating one, like the one Edward came up with.

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A man by the name of Arthur Sicard, while at work in a wheat field, saw a wheat thresher and thought it could be redesigned and capable of having the same effect, but with snow. He thought this would make delivering milk a lot easier when it was snowy outside. It took him nearly 30 years, but eventually he got it right and sold his model to cities in Quebec

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The Hudson Bay railway had started construction way back in the 1880s. Eventually, construction was delayed due to WWI, but resumed in 1923. At this point however, construction became very expensive and it wasn’t nearly as efficient as it was before. The railway was finally open as of September 10, 1929.