60 



REPORT OF COMMISSIONERS OF INLAND FISHERIES. 



planted at one time, on February 20, 1903, in the same locality, on 

 the shore of Mill Cove, Wickford. The specimens were divided into 

 three classes, according to their age and size, as follows: 



1. Clams taken form Nayatt Point averaging 25mm. (1 inch), 

 and undoubtedly of the set of 1902, age about seven months. 



2. Clams taken from Green's Island, averaging 60mm. (2-j 

 inches), undoubtedly of the set of 1901, age about one year and seven 

 months. 



3. Clams taken from the Kickemuit River at one of the low 

 winter tides. The time of setting is unknown, but the clams showed, 

 by their large size and thick shells, that they were of great age. 



At various dates during the next summer samples of these clams 

 (about 25 at a time) were taken up, measured, and preserved. The 

 notch and its growth ring on each specimen prove an accurate record 

 of the size of the clam at the beginning of the experiment. The 

 average measurement of these samples from the 20th of February, 

 1903 (the beginning of the experiment), and on the dates next ex- 

 amined, together with the percentage in increase, is given below: 



The clams were further grouped, according to size, into six classes 

 Tegardless of age, and the result of this classification is as follows : 



