160 Journal of the Asiatic Society of Bengal. [N.S., XVI, 
below that value, the body, E, will sink, block up the hole 
at C, and the liquid will cease to flow down the pipe B. If 
liquid continues to flow from A, the cup D, will fill up and 
the excess liquid will run over the sides or from a pipe such 
as F placed higher up on the wall of the cup. 
n the particular case under consideration it was necessary 
floating body was made of glass. The models were made of 
lead, and it was early apparent that the floating body, hereafter 
PLATINUM WiRE Loop 
To Li-FT FLoat From 
SEATING 
FLOAT GRouND 
To Fit SEATING 
MERCURY 
SEATING - 
Fie. 2. 
called the “float”, must be of such a shape that it would fit 
exactly into the opening ©, Fig. 1. The apparatus made of 
lead soon became corroded on the surface by the action of the 
oats. 
liquid in such a position that its shaped end will always find 
