Stopper valve of Allenbury's Feeding Bottle, 
shewing slit through which urine enters the 
bulb, also shewing notch in line with slit, so that 
it may be made to come directly over the surface 
of the Hypobromite solution. 
Side view of instrument in position charged 
with Hypobromite solution in bulb (a) with 
stopper inserted in the opening and adjusted, so 
that coloured indicating fluid in (b) (which, of 
course, is never emptied except under special 
circumstances) is at the first mark on the 
graduated perpendicular tube. It is now ready 
to receive one c.c. of urine through the opening 
in the centre of the stopper. Rather less than 
half-size. 
