Loss of Heat from Bare Steam Pipes 



27 



40 



60 80 100 120 



SteamJEressure above Atmosphere 



140 



allows for the different loss of a different size of pipe, but Barrus 

 test on the lo-inch pipe is equally strong evidence that it does 

 not. Hudson -Beare's test also agrees with the theory. 



Fortunately we are not entirely dependent on these tests for 

 this point. The previous paper on the "Loss of Heat from 

 Covered Steam Pipes" showed by a large number of tests that 

 the theory did in that case most certainly allow correctly for dif- 

 ferent outside diameters of coverings. Now, the loss of heat 

 from the surface of a bare pipe must be governed by the same 

 laws as the loss of heat from the surface of a pipe covering, and 

 we may therefore conclude that the theory does cover the loss, 

 from a pipe of any diameter. 



