33 resultados para Approximate relative percentages (wt. %)
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Approximate estimate of the cost of macadamizing, grading, bridging and putting in culverts from Hurst’s Bridge above Thorold to Port Robinson (2 pages, handwritten), n.d.
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Chart of approximate quantity of excavation in slides in the deep cut, July 1, 1848.
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Young girl, Martha. Approximate age 6-9 years old. Ambrotype? Ca. 1850s? Brass matting with brass border. Wooden case. Photograph very faded. 8.5mm x 9.5mm (yellow sticker with “x” on front of case).