51 



ponds constructed in Druid Hill Park for the purpose for 

 wliicli they are intended. 



The young fish that we hatched in June and July of last 

 Summer have grown with great rapidity, and are in fine 

 condition. The experience of last year has been at least of 

 great value. 



HATCHING HOUSE. 



The experience of another season has demonstrated the 

 adaptability to the purpose_, and the excellence of construct- 

 ion of the Druid Hill Hatching House. 



During the past October we had at one time in the hatch- 

 ing apparatus about 1,300,000 eggs, and these the eggs of 

 the California Salmon, which are larger than the eggs 

 of any of our fishes, and yet the house was not overcrowded. 

 We need, however, considerable more room for nursery 

 tanks, in which to care for the young fish, in case it is 

 necessary to keep them any length of time before their dis- 

 tribution. The necessary addition for this purpose will 

 receive our early attention, and, if possible, space will be 

 secured. The only necessary change to be made in the 

 apparatus as at present constructed, is an extention of the 

 filtering tank, which, through a misunderstanding, was con- 

 structed smaller than designed. Our experience has proved 

 the superiority of the glass hatching jars in the ease and 

 comfort with which they can be operated ; the cleanliness 

 and purity is such that we have almost discarded the other 

 forms of hatching apparatus, hitherto used in the Hatching 

 House^ and now reserve the hatching troughs to be used as 

 nursery tanks only. 



When operating with only a small quantity of eggs, and 

 desiring a more perfect filtration of the water, \vc frequently 

 use two jars, passing the water through the first jar, filled 

 with gravel and sand, and thence to the second jar. That 

 the form and manner of using these jars may be more clearly 



