The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

1900.] MARINE REVIEW. 29 Looking inside a Shelby Steel Boiler Tube you will see that its inner surface is perfectly smooth and clean. This means a considerable lessening of their liability to collect scale. This is a point worthy of the careful consideration of all users of boiler tubes. Shelby Tubes are made of the highest possible grade of Open Hearth Steel, and being Cold Drawn are as dense, tough and ductile as it is possible for a tube to be made. Being Seamless they do not split or crack as in the case of lapwelded tubes, nor do they fail at the ends. There are a whole lot of good points about Shelby Tubes which are told in our Catalogue "C". Write for one. It is yours for the asking. PYEete te eet eee