The main type of soil is sand, and the sand flats, for the most part in Plum Island Sound, comprise some 250 acres. The remainder, 150 acres, is mostly mud in scattered sections along the Rowley River and in patches on the main flats. The only really productive flats are the little coves and creeks of Rowley River and the Knob Reefs in Plum Island Sound. The Knob Reef clam grounds produce very large and fine clams, which lie on the lower edge of the flat and are exposed only a short time every tide. Knob Reefs also has the distinction of possessing probably the finest clam set of its size in the State, which would furnish abundant opportunity for restocking all the barren Rowley River flats, if the town authorities had taken proper measures to transplant this seed. As it is, this extensive set, too thick for good growth, is rapidly wasting away. The history of the industry is one of steady decline. Reliable evidence exists to show that almost all the flats of Rowley once produced clams, and that large areas now waste were formerly productive. That these immense barren areas, possessing such an enormous latent wealth, should be allowed to remain thus unimproved, is a most conclusive argument for the need of radical action. No settled attempt, however, except for a single closed season in 1906, has ever been made by the clammers or town authorities to better the conditions, or to check the decline in the productive territory that remains. SUMMARY OF INDUSTRY. Number of men, 15 Capital invested, $800 Production, 1907:-- Bushels, 2,000 Value, $1,500 Total area (acres):-- Sand, 250 Mud, 150 Gravel, - Mussels and eel grass, - Total, 400 Productive area (acres):-- Good clamming, 20 Scattering clams, 80 Barren area possibly productive (acres), 300 Waste barren area (acres), - Possible normal production, $60,000 _Ipswich._