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Page:Popular Science Monthly Volume 56.djvu/180

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distinct. The stones in our early English and French cellars practically touch each other, as in the old cellar in Fort William Henry, in Maine. Sometimes broken stones fill the interstices, as in another example of stonework at Fort William Henry. Mortar has been used here more or less since the beginning of the seventeenth century.

Although European or post-Columbian walls and cellars differ considerably among themselves, it is within certain limits. Post-Columbian

PSM V56 D0180 Supposed norse pathway in massachusetts.png
Supposed Norse Pathway in Massachusetts.

walls, or foundation walls when built on the surface of the ground, were practically homogeneous in character, the French only attaining to one metre in thickness, whereas Icelandic walls were disposed in three distinct parts, the inner and outer sides being constructed in layers and the space between being filled in with closely packed earth, while they were never less than a metre and a half thick.