116 SEA-WATER AQUARIA. 



The water is pumped up from the large dark reservoir into the 

 fountain reservoir by means of a small rotary pump (12, 13, 14). 

 A plan of this pump, showing both front and side views, is given 

 in Miss Phillips' other drawing (Plate VI.). The corresponding 

 portions of the pump in both side and front views are marked by 

 similar figures. There is a strong wooden board (i), 8^ inches 

 broad, i^ inch thick, and 4 feet long; and on this is fixed a 

 driving wheel (3), with a suitable handle (4), and lower down on 

 the board is securely attached the actual pump (5). An india- 

 rubber driving cord (6, 6) passes around the driving-wheel and a 

 small " head " connected with the pump ; and so by seizing the 

 handle (4) and turning the driving-wheel, the pump is very easily 

 worked. 



The india-rubber hose used with the pump is an inch in dia- 

 meter. The delivery hose (10) is fitted on to the upper opening of 

 the pump (9), and is tightly fastened thereon by copper wire. The 

 suction hose (7) is secured in the same manner on to the lower 

 opening (8) of the pump. The driving-wheel (3) has a diameter 

 of 15 inches, and the handle (4) is 4 inches in length. These 

 measurements, with those of the wooden board already given, will, 

 I think, give a general idea of the size of the entire concern. 



Passing back again now to the drawing of the aquarium (PI. V.) 

 the pump (t2, 13, 14) is seen in its actual position. The strong 

 wooden board (14) is fastened securely flat against the wall (18) 

 in an oblique or slanting direction, so that the driving-wheel (12) 

 is at a convenient height for working. The actual pump (13) is 

 quite near the floor, since it is necessary to ensure the proper 

 working of such rotary apparatus for water to be always in it; and 

 this is ensured by the syphon arrangement of the suction hose (16). 

 It should be mentioned that all the parts of the pump in contact 

 with the water are covered by vulcanite, and this is of course 

 essential always where sea-water is in question, as otherwise the 

 water would become impregnated with poisonous metallic 

 impurities. 



I have had this apparatus working for several months, and it 

 acts admirably. In order to fill the fountain reservoir from the 

 large dark reservoir, it is only necessary to turn around the 

 driving-wheel at moderate speed for about a minute and a-half. 



