Image - Library and Archives Canada. (2013). Retrieved 7 August 2020, from https://www.bac-lac.gc.ca/eng/discover/patents-1869-1919/Pages/image.aspx?Image=e003431370&URLjpg=http%3a%2f%2fdata2.collectionscanada.ca%2fe%2fe138%2fe003431370.jpg&Ecopy=e003431370