<j- pq d q q 
)vxoris. 
Phil. Trans.\S 84 . Plate 4^2 
UD IOM ETER. 
. Circular iron, plate into which the tubes a,' & cc 2 cere fioceci 
. Eudiometer fees ten &cb into C in the same way as the Boro- 
meter is ficced. 
. Iron block cow'rying Eudiometer hawing ou -flange which presses 
on D and with the indlarubber wetcher c' makes cl watertight 
joint , the joint between A Sc C is made by cl leather washes. 
, Outer case of Eudiometer. 
. Eire ccnd nut by which A is supported from D and; the joints 
between A. Sc C and C & D. acre made tight, there are three of 
these pins placed symmetrically round A. 
TOP OF EUDIOMETER 
clcl.P latcnum wires sealed through 
prominences bb. over -/A indlarubber 
lipped. 
tubes 
STEEL TAP 
-'with Sections to show 
cotxstmetion of joints 
A. Body of Togo. 
T3. Ejcurometer tube swrrounded at lower end with 
iridlarubber rings b, these are compressed by 
the collar b ? and the nut b ? 
C. Gridss tube surrounding barometer it stands on 
the brass tube c’ the joint being made with india- 
rubber c ? bound with copper wire. 
Union joint connecting iron tube with body of tap 
the tube carries ufLanqe cC and by means of a 
nut. is pressed against the- leather* washer d 2 
E. Joint szrnilar to Jl) . 
E. Slot and Screw to allow the joint D to be made or 
unmeute,, without disconnecting E. and, E. 
To EvloLLo vnetd ' 
ELEVATION OF TAP. 
showing in section the washer and 
screw, which keep it in place . 
SECTION OF TAP 
ihrouq h a. t. 
. Scathe of Inches. 
11.1*. L ow e cle 
West.Newman.& C? soulj? 
^ To mercury reservoir. 
