SEA-WATER AQUARIA. 115 



pierced by a glass tube (lo), which is bent down to the base of 

 the tank and passes along, more or less hidden by rockwork, to 

 near the centre, where it is twisted up for about nine inches, and 

 ends in a very finely-drawn fountain-jet (5). Outside the tank the 

 glass tube is connected by a piece of indiarubber tubing (9) with 

 a fountain reservoir (6). 



With regard to the glass fountain tube, this necessarily is bent 

 three times in the vertical plane, and also twice horizontally on 

 account of the irregularities of the rockwork in the tank ; and as 

 considerable care was needed in the fashioning of the finely-drawn 

 jet, I thought it best to obtain three or four tubes (in case of 

 breakage) ready shaped, from skilled manipulators. 



The fountain tube in use, therefore, and some duplicates of 

 the same, were supplied to me by Messrs. Townson and Mercer, 

 of 89 Bishopsgate Street Within, London, E.G. 



The fountain reservoir (6) is supported on di metal stand {'j)^ 

 5 feet 6 inches in height, consisting of a strong rod with a circular 

 flat plate at the top, and three stout feet, which are screwed to the 

 floor. 



As for the sta?id (7) it really is an old music-stand, altered by 

 a local smith for the purpose to which it is now applied. 



The fountain reservoir (6) is a glass "aspirator." It measures 

 about I foot 9 inches in height, inclusive of the narrowed and 

 raised mouth, and nearly i foot in breadth, and holds 5 gallons of 

 water. At the base of the aspirator is a small glass stopcock (8) 

 communicating by indiarubber tubing (9) with the fountain tube 

 (10) in the tank. Fixed into the mouth of the aspirator (6) is 

 also the open end of the delivery hose (15) of a pump (13). 



The large dark reservoir (17) is a circular earthenware " mixing 

 pan," over 2\ feet in height, 2 feet in diameter, and made to hold 

 40 gallons. The " mixing pan " came without any cover, but I 

 had a flat one made of hard oak, with a sufficient opening to 

 allow of the passage into the reservoir of the overflow tube (11), 

 and the passage out of the reservoir of the rubber suction hose 

 (16) of a pump (13). The suction hose (16) is i inch in diameter; 

 the open end hangs in the water of the reservoir, and as the hose 

 passes through the cover over the side of the reservoir down to 

 the pump, it acts as a syphon, and the pump always contains water. 



