322 



REPORT — 1841. 



made to deviate from the ordinary laws of friction, and to be proportional partly 

 to the pressure and partly to the extent of the surface of contact. The fol- 

 lowing are the tabular results of experiments made by Mr. Timme with 

 springs No. 1, No. 3, and No. 4. 



Similar experiments will be repeated Avhen the indicator shall have been 

 for some time in operation, and when the cylinders are at the temperature of 

 the steam. From the peculiar construction of the pistons, it is not, however, 

 anticipated that there will be much difference in the results of these experi- 

 ments. 



Spring No. 1, A= -028. 



