It is hard to say to what extent the younp; were injured, but 

 r.t all events the danoge was cir.s id arable; this v/as shov.m only too 

 clec.rly v^rhen v/e counted the young durin!^ the next fev/ days. 



(Results of experiments f ullov/: ) 



No, 1 Yfithout circulabion, fed vribh crabs twice daily 



July 12-15 Put in (48-50-30-6) 134 young 



15 Counted, cleaned 47 



Transferred to box No* 3, same conditions 

 21 All dead 

 No. lb No circulation July 17-21, fed with crabs ti'dce daily 



July 17-21 Ptit in (63 - 129 - 84) 276 young 



21 Coijinted ■ 68 



25 " 12 



which w-cre transferred to experinent box 

 Four reached 4th stage 



Noe 3 Engine V'forking, fed v/itli crabs eight tines per 24 

 .hours. Regulator 



July 21-22 Put in (275 r 275) 550 young 



26 Counted 365 



26 All apparently 3d stage 



, 29 Counted 3d stage 287 



31 4th stage seen 



Aug. 1 Took out (4ths) ■ 20 



2 " 44 



3 " .29 



4 " 16 



5 " 5 



6 " 5 



7 " 7 



8 " 4 



9 " ■ • ' 1 

 12 " 1 



Total 132 bottom stage young 



No» 2 The box given coat of copper paint, propeller raised, 

 from now on c.lways fed as in Noe 3 



July 23-24 Put in (471 i 300) 1271 young 



28 Counted (lar-stly 2d stage) ■Ml 



Aug. 5 " 48 

 18 Box enpty, all dead 



42 



