306 



cox. 



of the tests are intended to be comparable only, it is permissible to omit this 

 constant correction entirely. It was not convenient to attach the calorimeter 

 close to the boiler. It was attached to the steam pipe 22 feet away and owing 

 to the radiation from this pipe, even though all parts were well covered, the 

 amount of moisture may be somewhat high. 



The readings were made on several days during the firing of coal 

 from three different sources and at different times of day, so that the 

 greatest variations of load are represented. These readings are shown 

 in Table I. 



Table I. — Steam calorimeter readings. 



Date, 1907. 



Time 



after 



starting. 



Steam- 

 gauge 

 pressure. 



Readings of 

 thermometer. 



Upper. 



Lower. 





A. m. 



Kilos per 

 sq. cm. 



°C. 



°C. 



June 19 



5 20 

 5 45 



7. 8044 

 7.8044 



168 

 168 



109 

 110 







6 10 



7.8044 



169 



110 





6 35 



7. 1716 



165 



110 



June 20 



1 12 



7.8044 



167 



109 





1 60 



7. 5232 



167 



109 





2 42 



6.8200 



164 



110 



, 



3 00 



7.8044 



168 



110 





4 00 



7.8044 



168 



110 





4 40 



7.8044 



167 



109 





4 55 



6.4685 



161 



108 





6 25 



7.3825 



166 



111 



June 21 



2 40 



3 20 



7.5232 

 7. 1716 



167 

 165.5 



110 

 109.5 







5 50 



7.5232 



167.5 



108.5 





6 20 



7. 5232 



167 



108.5 





6 30 



7. 1716 



166 



lOS 





6 45 



7.8747 



169 



109 



July 15 



5 30 

 5 50 



7. 1716 

 7.1716 



163 

 163 



110 

 110 





July 16 



1 30 



7. 1716 



164 



110 





1 50 



7.4529 



165 



109 





4 40 



7. .3825 



165 



110 





5 05 



7. 1013 



163 



109 





5 20 



7.8747 



167 



110.5 





6 15 



7.5935 



166 



110 



