REARING THE YOUNG FRY. l6/ 



otherwise it would soon become so foul as to be 



cB bem $aftdjen angebradjten 9Jfi$r<$en erretcfyt, burd) tt>eld)e3 baS afegefjenbe 

 SSaffer erfe^t n>erben fann. 



Slupen ant $aftd)en beftnbet ft(^ cine efcelflape, tt>elc^e ft^ bur(i) btc 

 SBettegimg be^ SBafferrabc^en^ on 3ett gu 3ett ijffnct, unb fltet baki mit 

 bem SBaifcr etwa^ gutter au^. 2)Zan regulirt ba<3 Deffnen ber 



Self-working Machine for feeding Trout. 



