582 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [44] 



to the next forms a little waterfall, and is therefore always properly 

 aerated. The Selzenhof establishment can hatch about 3,000,000 eggs 

 at the same time. 



3. Eadolfszell. — This establishment is situated in the little town of 

 Radolfszell on the "Untersee," a branch of the Lake of Constance, and 

 like the preceding one it is the property of Mr. Schuster. It was founded 

 in 1877, principally for the purpose of reproducing Corcgoni. It con- 

 sists of one large hall, which formerly served as a public bath. The 

 water used in it is the common drinking water of the place, and is not 

 filtered. In summer its temperature is about 8° R. [50° F.], and in win- 

 ter it sometimes falls to 1° R [34° F.] The water is contained in a reser- 

 voir placed in the highest part of the hall, and thence it is by wooden 

 conduits led into the troughs, of which there are 7, some without di- 

 visions, and with several compartments, on the Williamson system. 

 The troughs are at some height above the ground, resting on wooden 

 supports. For the hatching of Coregoni a Holton apparatus is princi- 

 pally employed. It consists of a kind of wooden box into which the 

 water enters through a hole in the bottom, and gradually passes through 

 1 5 frames made of iron wire, placed one above the other. Each of these 

 frames can hold about 20,000 eggs. The water finally flows over the 

 upper edge of the apparatus. 



Although the principal fish raised in this establishment are Coregoni, 

 some other fish are also cultivated, as the lake, trout (among them the 

 famous trout from Lake Garda, some young specimens of which I saw, 

 which had been raised in the establishment), 8alvelinus, and Thymallus. 

 They are placed in the upper course of the Rhine, and some in the lake, 

 where formerly they were not found. After the river and lake had been 

 stocked, people soon began to catch these fish. The German Fishery 

 Association pays a reward of $1.10 to every fisherman who can prove 

 that he has caught one. 



4. Seewiese. — The establishment of Seewiese near Gemiinden in Fran- 

 conia (Bavaria) belongs to Mr. Frederick Zenk, of Wiirzburg, who 

 founded it in 1881 on ground belonging to him, and entirely at his own 

 expense. The establishment does not receive subsidies of any kind, and 

 has no other iucome except from the sale of eggs and fish. 



The hatching room is 20 meters long, 9 broad, and3J high [about 65^ 

 X 29 J x Hi feet]. The water rises to a height of 2 meters [about (U 

 feet] above the floor, and runs along the northern wall in a pipe having 

 a diameter of 8 centimeters [about 3^ inches.] It generally comes from 

 a brook in the neighborhood, which contains a great many fish, and is 

 therefore called the " Fischbach." The temperature varies from a max- 

 imum of 10° R. [54.5° F.] in summer, to a minimum of 1° E. [34° F.J in 

 winter. 



If the water flows too warm or too cold, it can be mixed by a small 

 hydraulic pump ; or there may be substituted for it spring water, hav- 

 ing a constant temperature of about 5° R. [43° F.J The water of the 

 brook is filtered through an apparatus containing sponges and sand. 



