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SCOTCH MARINE INTERNALLY-FIRED BOILERS 



MADE IN SIZES EIGHT HORSE POWER AND LARGER 



TN A POWER PLANT of the smaller size, the choice of the boiler is 

 ^ a very important matter as one of the largest items of expense is the 

 cost of the fuel — and many concerns have failed simply because the 

 profits of the business were lost in buying coal to be practically 

 wasted in an extravagant boiler. 



Scotch Marine Boilers are economical in first cost and are entirely 

 self contained, requiring no expensive foundations or brick settings, and 

 can be readily moved from place to place with very little trouble or 

 expense. They require no heavy fire fronts, setting castings or wall 

 binders. 



These boilers occupy very small space and are very suitable for 

 use in places where floor space is limited, and on account of the limited 

 head room required, are very suitable for use in cellars and basements. 



In Scotch Marine Boilers all the lire is in the furnace inside the 

 boiler, and the heat travels the length of this furnace and then back 

 through the tubes, thus traveling twice the entire length of the boiler 

 before going to the stack, and as at all times the fire is entirely 

 surrounded by water all the useful heat is absorbed and converted 

 into steam. 



In this type of boiler no brick work is required and there is no 

 wasteful radiation of heat through the settings and no expensive brick 

 walls to keep in repair. 



The selection of the boiler is always a perplexing problem, but all 

 engineers have agreed that the Scotch Marine Water Back is the only 

 correct type, and the reason is very apparent as the boiler embodies the 

 following good features: 



Highest Possible Economy, Long Life, Freedom From Repairs, 

 cAccessibitity for Cleaning, Reasonable First Cost, 



In addition to the above good qualities these boilers require no 

 brick work, being self contained; no foundation, except a good floor. 

 These are the best boilers for small power plants. 



MURRAY IRON WORKS COMPANY 



BURLINGTON, IOWA 



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