254 BULLETIN 42, UNITED STATES NATIONAL MUSEUM. 



(35) White neutral oil, specific gravity 36° Baum6 ; fire test 360^ F. (59672.) 



(36) White neutral oil, specific gravity 38^ Baum6. (59673.) 



(37) Yellow neutral oil, specific gravity 33° Baum6. (59674.) 



Ten grades of paraffin oil are shown, as follows : ' 



(1) Light amber, specific gravity 30° Baum6 ; fire tost 275'^ F. (59675.) 



(2) Dark amber, specific gravity 29'^ Baum6 ; fire test 275'^ F. ; cold test 30° F. 

 (59676. ) 



(3) Dark amber, specific gravity 28° Baum<S ; fire test 300° F. ; cold test 35° F. 

 (59677.) 



(4) Dark amber, specific gravity 27° Baum<^ ; fire test 300° F. ; cold test 40° F. 

 (59678. ) 



(5) Light amber, specific gravity 26° Baumt'i; fire test 300° F. ; cold test 25° F. 

 (59679. ) 



(6) Light amber, specific gravity 25° Baum^ ; fire test 300° F. ; cold test 20° F. 

 (59680. ) 



(7) Dark amber, specific gravity 24° Baumi^ ; fire test 3.50° F. ; cold test 25° F. 

 (59681.) 



(8) Dark amber, specific gravity 23.5^ Baume ; fire test 350° F. ; cold test 45° F. 

 (.59683.) 



(9) Dark amber, specific gravity 23° Baum^ ; fire test 375° F. ; cold test 35° F. 

 (59682. ) 



(10) Light greenish brown, specific gravity 22° Baum<5 ; fire test 400° F. ; cold 

 test 25° F. (59684.) 



Oils suitable for lubricating purposes are illustrated by twenty-one 

 specimens : 



(1) Engine oil, dark greenish red; specific gravity 2.5° Baum6 ; fire test 350° F. 

 (59686.) 



(2) Cylinder oil, dark greenish red; specific gravity 29° Baum^ ; fire test 400° F. 

 (59691.) 



(3) Cylinder oil, dark greenish; specific gravity 28° Baume; fire test 500° F. 

 (59692.) 



(4) Cylinder oil, dark greenish red ; specific gravity 28° Baum(5 ; fire test 450° F. 

 (59693.) 



(5) Cylinder oil, filtered; dark greenish red; specific gravity 28° Bauiu6; fire test 

 400° F. (59694.) 



f6) Cylinder oil, dark greenish; specific gravity 28° Baum6 ; tire test 600 ' ; cold 

 test 25° F, (59695. ) 



(7) Cylinder oil, dark greenish ; specific gravity 27° Baum^ ; fire test 400° F. 

 (59696.) 



(8) Cylinder oil, dark greenish ; specific gravity 26. .5° Baura6 ; fire test 600° F. ; 

 cold test 20° F. (59697.) 



(9) Cylinder oil, dark greenish ; specific gravity 25° Baum^ ; fire test 500° F. 

 (59698.) 



(10) Cylinder oil, black; specific gravity 25° Baumd ; fire test 600° b". (59699.) 



(11) Cylinder oil, dark greenish; specific gravity 28° Baume; fire test .550° F. ; 

 cold test 2.5° F. (59700.) 



(12) Lubricating oil, dark greenish brown; specific gravity 29° Baum6 ; fire test 

 300° F. (.59701.) 



(13) Lubricating oil, dark greenish brown; specific gravity 28° Baum^ ; fire test 

 350° F. (.59702. ) 



(14) Lubricating oil, dark brown; specific gravity 37° Baume; fire test 400° F. 

 (59703.) 



(15) Lubricating oil, dark brown; specific gravity 26° Baum6 ; fire test 400° F. 

 (59704.) 



(16) Lubricating oil, specific gravity 25° Baum6; fire test 500° F. (59705.) 



