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Modern method og grand pianoforte case construction

Modern method og grand pianoforte case construction.png Jonas Chickering’s full solid cast grand metal plateThumbnailsC. P. R. grain elevator at Fort William, OntarioJonas Chickering’s full solid cast grand metal plateThumbnailsC. P. R. grain elevator at Fort William, OntarioJonas Chickering’s full solid cast grand metal plateThumbnailsC. P. R. grain elevator at Fort William, OntarioJonas Chickering’s full solid cast grand metal plateThumbnailsC. P. R. grain elevator at Fort William, OntarioJonas Chickering’s full solid cast grand metal plateThumbnailsC. P. R. grain elevator at Fort William, OntarioJonas Chickering’s full solid cast grand metal plateThumbnailsC. P. R. grain elevator at Fort William, Ontario

A. Continuous bent rim.
B. Wooden struts.
C. Iron shoe holding struts and connecting with iron plate.
D. Main beam.