49 



The accompanying cut sliows the manner in which the water 

 is introduced and taken away. They are admirably arranged 

 to secure a perfect circulation and change of water which is 

 constantly flowing through them. The water having passed 

 through the upper troughs furnishes the lower pair, dropping 

 down through a space of about 18 or 20 inches, it is com- • 

 jdetely broken and aerated. 



Those marked ''C" are arranged so as to cause the water 

 to enter at the bottom of the trays in each division ; flowing 

 up through them, and over the top of the partition, is con- 

 ducted into the next division from below. This is the form 

 of hatching box designed by John AVilliamson, Secretary of 

 the California Acclimatizing Society. The troughs marked 

 •'D" are so arranged that the water takes just the opposite 

 • course, entering at the top of the trays, it flows down through 

 them. This device is patented by N. W. Clark, of Michigan, 

 who has kindly permitted their use by us, Avithout charge. 

 At "B" there are two flights of Coste trays, after tlie model 

 of those used at Huningen and elsewhere in Europe. ''E" 

 are hatching boxes, as patented by Green & Holton, and so 

 successfully used in the liatching house of the New York 

 Commission. The right to use them was kindly accorded us 

 by Seth Green, Esq., the assignee. 



In aquarium ''F" which is supplied with running water, 

 we intend exhibiting rare fishes, from time to time. The 

 porcelain lined sinks ''H," furnished with the same water 

 which is used in the troughs, are of great convenience. All 

 the water, save that from the sinks, after being used in the 

 hatching house, is conducted into the ponds below the build- 

 ing. The coste trays and the troughs next to them can be 

 removed at any time without interferring with the flow of 

 Avater, and can be replaced by stoves or aquaria as desired. 

 It is scarcely probable that it will be found necessary to use 

 stoves as the S2:)ring water entering the building at a temper- 

 ature of 53° Fahrenheit, and being exposed in the closely 

 built stone building, the temperature is kept much above 

 freezing. The two rooms above, in the second story, are oc- 

 cupied respectively as office and sleeping apartment for keeper. 

 The moisture is cut ofl" from the second story, by a layer of 

 -slate in the walla, 

 5 



