2.2100 ANNUAL RING RECORDER (6) 



Mollusk studies often require that large numbers of shells 

 be read to locate annual rings and their distance from some 

 reference point recorded. There is a need for a device 

 which will be positioned by an operator but the distances 

 will be automatically digitized and punched on cards. 



2. 2200 AUTOMATIC FISH MEASURING MACHINE (43) 



A device that would receive fish from a hopper, weigh 

 and measure each one and give data readout preferably 

 on magnetic tape, and may take scale sample in identi- 

 fiable sequence to correspond with measurement. 



439 



