Bauhaus-Universität Weimar

Optic Projection: Principles, Installation and Use of the Magic Lantern, Projection Microscope, Reflecting Lantern, Moving Picture Machine
Gage, Henry Simon and Henry Phelps Gage
time smaller cylinders with the gas at a much higher pressure (ioo 
to 120 atmospheres) are employed (see also § 156). In using the 
gas it is drawn off through a reducing valve by which it can be 
delivered at any pressure desired, and of course in any volume 
One should never try to use the gas without drawing it through 
the reducing valve. The cylinders have special junctions for the 
reducing valve, so that it is easy to make the connections. 
Fig. 57. Oxygen Cylinder 
with Com pressed Oxygen, 
The Pressure Gauges and 
the Mixed Jet or Burner. 
[Catalogue of Schmidt and »j 
Ilaensch). *" 
B Tip of the nozzle of 
the mixed jet. 
K Holder for the lime. 
Tine end of the lime is used, 
not the side as in fig. 56, 59. 
G Handle of the stop-cock 
for hydrogen in the tube of 
the burner. 
S Stop-cock for oxygen. 
II The tube conveying 
hydrogen to the burner, steel 
cylinder not shown. 
0 Tube conveying oxygen from the steel cylinder to the burner. 
J The high pressure gauge giving the number of atmospheres under which 
the gas in the cylinder is compressed. 
M The low pressure gauge to show the pressure of the gas after it has 
passed the pressure reducing valve (St.). 
St The handle of the valve serving to open the pressure reducing apparatus. 
V The valve of the cylinder. This must be opened to allow the compressed 
gas to escape into the tube passing to the reducing valve and to the high pres¬ 
sure gauge. It must be closed after every exhibition.


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