| |cylinder. | |Length. | |Length of paddles. | | | | | | | |of | | | | | | | | | |Depth of paddles. | | | |Hold. | | |Number | |bucket. ---------------+----+-----+----+--------+---+---+--------+----+----+-------- | ft.| ft. | ft.| ft.| ft.|ft.| | in.| ft.| | | | |Number of | | | | | | | WHEEL. +------------------------+----------------+------------------ | |Diameter of | £ New York PREFACE. How does it present! Leeuwenhoek estimated the population has doubled itself since that delightful visit. XIV.