Spirometer, 1848

Spirometer_Simon_Vogel_1848

Über die Menge der ausgeathmeten Luft bei verschiedenen Menschen und ihre Messung durch das Spirometer: ein Beitrag zur medicinischen Diagnostik : mit 1 Abbildung by Gustav Simon and Julius Vogel, 1848, endplate.  Spirometer manufacturer unknown.

This book was printed two years after Hutchinson’s treatise on the spirometer and the vital capacity and his design has already been modified.

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