SUNIER: The Laboratory for Marine Investigations. 



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Plan No. 3. Top portion of aquarium building. 1 and 2 = tanks; 3 tables for 

 small aquaria and hatching jars which can be connected to the circulation ducts; 4 = 

 distilled water reservoir; 5 = distilling apparatus; 6 = centrifugal pump and electric 

 motor set; 7 = centrifugal pump with benzine motor set; 8 = hand pump; 9 = trap- 

 door to cellar. 



Length of the whole aquarium building from East to West: M, 18.30. 



The dimensions of the four smal tanks (2, Plan No. 3 and Photo No. 

 6') ) are 1.75 M. by 1.35 M. by 1.00 M., the capacity of each of these 

 four tanks is, consequently, 2350 L.; from this we get the combined capacity 

 of the six tanks as nearly 21 '/2 ^^- The plate-glass panes, which almost 

 entirely make up those walls of the tanks which face the middle of the 

 aquarium chamber, are 2 cm. thick, and are simply built into the concrete 

 walls of the tanks, which is possible without danger of cracking, owing 

 to the small temperature variation in the course of the year, in Batavia. 



There is room on the four tables (3, Plan No. 3) for small aquaria 

 and hatching jars, which can be connected with the sea water circulation 

 ducts; these tables are situated on the continuation of the floor of the tanks, 

 that is to say, 1.10 M. above the floor of the aquarium chamber. 



Behind each of the two rows of tanks runs an accommodation way whose 

 floor is level with the floor of the tanks; each of these accommodation ways is 

 separated from the aquarium chamber on both sides by wooden doors. 



Besides which, the top edge of these walls of the tanks, which form the 

 boundary between tanks and aquarium chamber, carries a wooden partition, 

 which stretches up to the fibro cement ceiling of the aquarium chamber. 



') Photo No. 6 was not taken by the writer, but by Dr. H.C Delsman ; the re- 

 mainder were taken by the writer. 



