9O ROUGH-AND-TUMBLE ENGINEERING 



You may ask "how am I to know when I am getting 

 a good grade of oil?" The best way is to ascertain a. good 

 brand of oil, then use that and nothing else. 



We are not selling oil, or advertising oil. Howe 

 before I get through I propose to give you the name of a 

 good brand of cylinder oil, a good engine oil as well as 

 good articles of various attachments, which cut no small 

 figure in the success you may have in running an engine. 



It is not an uncommon thing for an engineer (I don't 

 like to call him an engineer either) to fill his sight- feed lu- 

 bricator with ordinary engine oil, and then wonder why 

 his cylinder squeaks. The reason is that this grade of oil 

 cannot stand the heat in the cylinder or steam chest. 



If you are carrying 90 pounds of steam you have about 

 320 degrees of heat in your cylinder, with 120 to 1^5 

 pounds you will have about 350 degrees of heat, and in 

 order to lubricate your valve and valve-seat, and also the 

 cylinder surface, you must use an oil that will not only 

 stand this heat but considerably more so that it will have 

 some staying qualities. 



Then if you are using a good quality of oil and your 

 link or reverse begins to knock, it is because some part of 

 it wants attention, and you must look after it. And here 

 is where I want to insist that you teach your ear to be 

 your guide. You ought to be able to detect the slightest 

 sound that is unnatural to your engine. Your eyes may 

 be deceived, but a well trained ear can not be fooled. 



