RCH TUMBLE ENG1NEEK 89 



tilil last a few minutes longer. 



another grade would do some belter. Now if you are 

 riiiur iy the best oil you can buy. 



You will find it very poor econoi jy cheap oil, 



.ot posted, you may pay price enough, but 

 get a very poor article. 



1 1 you arc running an engine for some one else, make 

 it pa; ur contract that you are furnished with a 



good oil. You can not keep an engine in good shape 

 with a cheap oil. You say "you are going to keep your 

 engine clean and bright," but that is impossible if you 



use a poor oil. 



Poor oil is largely responsible for the fast going out 

 of use of the link reverse among the makers of trac- 

 tion engines. While I think it very doubtful if this 

 c motion" can be equalled by any of the late devices, 

 instruction is such as to require the best grade of 

 <ler oil, and without this it is very unsatisfactory 

 (not because the valves of other valve-motions will do 

 a poorer grade of oil), but because its construction 

 as soon as the valve becomes dry it causes 

 the link to jump and pound, and very soon requires re- 

 pairing. While the construction of various other devices 

 are such, that while the valve may be equally as dry it 

 does not show the want of v.irly as the old 



link. Yet as a matter <> care not what the valve- 



motion may be, it requires a good grade of oil. 



