220 Mr. G. F. Rodwell on the Effects 



of a conical bag at the bottom of the tube B, and the air conse- 

 quently escaped upwards between the sides of the tube and the 

 descending stream ; but immediately the orifice of B touched the 

 water- surface, B was virtually closed, and the air being unable 

 to escape upwards was carried over into M. 



II. Rectangular delivery-tube r 3 D ths by ^-Jthsof an inch (C,fig.2). 

 Flow == half a litre of water in 16 seconds. 



Level of water maintained constant 

 in A during the experiment. 



Quantity of air carried down by 

 half a litre of water. 



At b, fig. 1. 

 » c, „ 

 a d, „ 



015 cubic centims. 

 500 „ „ 

 246 „ 



III. Rectangular delivery-tube ~th by T yth of an inch (D, fig. 2), 

 Flow = half a litre of water in 31 "5 seconds. 



Level of water maintained constant 

 in A during the experiment. 



Quantity of air carried down by 

 half a litre of -water. 



At b, fig. 1. 



» c, „ 

 „ d, „ 



No air carried down. 

 298 cubic centims. 

 140 „ 



IV. Square delivery-tube y^ths of an inch in the side (E, fig. 2). 

 Flow = half a litre of water in 16*25 seconds. 



Level of water maintained constant 

 in A during the experiment. 



Quantity of air carried down by 

 half a litre of water. 



At I, fig. 1. 

 » c, „ 

 it d, ,, 



677 cubic centims. 

 665 „ „ 

 427 „ 



V. Triangular delivery-tube |th of an inch in the side (F, fig. 2), 

 Flow = half a litre of water in 16*5 seconds. 



Level of water maintained constant Quantity of air carried down by 

 in A during the experiment. half a litre of water. 



At b, fig. 1. 

 „ c, „ 



„ d, ,, 



733 cubic centims. 

 673 „ „ 

 402 „ 



