[3] 



PRINCIPAL AQUARIUMS ABROAD IN 1873. 



633 



give au idea of the interior arrangement of the tanks and side rooms 

 for alligators, &c. It is drawn to ytu of the actual size. 



oa 



Fig. 1.— Ground Plan Vienna Aquabium. 



V. — Vestibule or entrance porcli paved with tiles. 

 T. T. — Tanks, in two parallel lines, back to back. 

 E. — Reservoir between tbe two lines of tanks. 



There are two rows of tanks, eight in each row, placed back to back, 

 with a space between utilized for a reservoir holding a large amount of 

 sea water. Each tank is about 9 feet long by 4 feet high and 5 

 feet in depth backward through the plate-glass front to the reck work. 

 Each contaius when half filled about 100 cubic feet of water. These 

 tanks are made of brick and cement, open at the top, and accessible in 

 the rear by a passage-way on each side of the central space R in the 

 plan. The plate-glass fronts are 1 J inches thick. The rooms at each 

 end are used for large shallow basins for crocodiles, fresh-water fishes, 

 and a collection of sea anemones. 



The marine fish are brought up from Trieste, and the salt water also, 

 by rail over the Semmering Pass. Some salt water has bee:i success- 

 fully made. The circulation of the water is maintained by pumps driven 

 by a small steam-engine, and the aeration is effected by a slender jet of 

 wter which, escaping under pressure, impinges on the surface and 

 carries down a large amount of air into the body of the water. Another 

 plan is to force air in fine jets from below and let it ascend through the 

 water. Sixteen cubic meters of salt water and alike quantity of fresh 

 water are renewed hourly. A resident zoologist has been engaged to 

 take charge of the scientific part of the enterprise. It promises to be 

 a pecuniary success, notwithstanding a great outlay for the building and 

 fixtures, amounting to 250,000 florins, or about $125,000. The daily 

 receipts amounted to about $;'>50 for some weeks. The expense of 



