454 



MEASURING OF AIR. 



ments were made on the steam valve gear, llie compressor 

 had been in commission since May i<;i2, and the a\erage 

 running hours worked out al)out i8 hrs per diem. 



The compressor was started up at 4 a.m. and was running 

 under normal load conditions until the first test (No. 2) was 

 made. The pressure gauges and thermometers used in the test 

 were all carefully caHbrated. The i-*esults of four dififerent 

 tests i.e.. Nos. 2, 4, 5 and 6 are dealt with in the following.^ 

 No. I test is omitted as this was a steam consumption test onh\ 

 made at a previous day, whilst No. 3 test did not give any 

 reliable results owing to the unstable conditions that existed 

 during the test and which were due to the attempt to run the 

 compressor with blocked governor. 



In the following calculations the same standard constants 

 have been used and the same reductions have been made as 

 under the turbo compressor test. 



Furthermore in order to simplify matters and to avoid 

 repetitions the arrangement and marking of tables correspond 

 as much as possible to this test. 



The following tables I (a) and (b) give the details of 

 barometer and hygrometer observations and reduction and 

 Table I (c) gi^'es the summary. 



TABLE I (a). 



Barometer and Hygrometer Readings. 



