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Igloo
Igloo

Illustration of the first row of an igloo

© 1970 Crown
Igloo
Igloo

Illustration of continuing to build the igloo by carving a spiral in the first row

© 1970 Crown
Igloo
Igloo

Illustration showing how to place blocks in igloo

© 1970 Crown
Igloo
Igloo

Sketch of the incorrect and correct arch of an igloo

© 1970 Crown
Igloo
Igloo

Igloo cross section

© 1970 Crown
Igloo
Igloo

The floor plan for an igloo.

© 1970 Crown