188 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



deuce in the success of the new form of hatching apparatus by author- 

 izing me to equip the station with them. The working form of appa- 

 ratus not having been then even designed on paper, it was not possible 



'II!' 1 



Fig. 4 Detail to illustrate hatching and transfer of shad fry to collectors. 



to prepare the drawings and to have the jar complete in all details ready 

 in time for the shad-hatching season. An improved form was devised 

 in which cork stoppers were substituted for the screw cap and metal 

 tops employed in the form now fixed upon. Ten tables suitably planned 

 to receive the waste water from the jars and carry it off from the build- 

 ing were constructed, the pipes for the distribution of water supply to 



