The five upper ones measure between their partitions:
7, 7, 5, 6, 7. (.273,.273,.195,.234,.273 inch.—Translator's Note.)
A reed-stump 11 millimetres (.429 inch.—Translator's Note.) across the inside contains fifteen cells; and the respective distances between the partitions of those cells, starting from the bottom, are:
13, 12, 12, 9, 9, 11, 8, 8, 7, 7, 7, 6, 6, 6, 7. (.507,.468,.468, .351,.351,.429,.312,.312,.273,.273,.273,.234,.234,.234, .273 inch.—Translator's Note.)
When the diameter of the tunnel is less, the partitions can be still further apart, though they retain the general characteristic of being closer to one another the nearer they are to the orifice. A reed of five millimetres (.195 inch.—Translator's Note.) in diameter, gives me the following distances, always starting from the bottom:
22, 22, 20, 20, 12, 14. (.858,.858,.78,.78,.468,.546 inch.—Translator's Note.)
Another, of 9 millimetres (.351 inch.—Translator's Note.), gives me:
15, 14, 11, 10, 10, 9, 10. (.585,.546,.429,.39,.39,.351,.39 inch.—Translator's Note.)
A glass tube of 8 millimetres (.312 inch.—Translator's Note.) yields:
15, 14, 20, 10, 10, 10. (.585,.546,.78,.39,.39,.39 inch.—Translator's Note.).