. The American florist : a weekly journal for the trade. Floriculture; Florists. 474 The American Florist. 'June I, economical should have a large surface for the fire to travel over before leaving it to enter the flue or ihimney ; and it is a well established fact that the boiler should not be so constructed as to im- pede or obstruct the free current of fiame passing over all its surfaces. The best authorities on this point after very careful study tell us that the nearer a boiler is constructed on the model of the present marine boiler, the closer we are to what expert engineers claim to be
. The American florist : a weekly journal for the trade. Floriculture; Florists. 474 The American Florist. 'June I, economical should have a large surface for the fire to travel over before leaving it to enter the flue or ihimney ; and it is a well established fact that the boiler should not be so constructed as to im- pede or obstruct the free current of fiame passing over all its surfaces. The best authorities on this point after very careful study tell us that the nearer a boiler is constructed on the model of the present marine boiler, the closer we are to what expert engineers claim to be the best slow combustion boiler. This form of boiler is, as proliably many of you know, so constructed that the fire is in a water box, so to speak, at one end, the flame traveling from the fire box un- der the main body of water its whole length and then returning through tubes at a higher elevation directly over it and entering the flue or chimney directly above the fire box. In this form of boiler the flame has to travel the whole length of the boiler and return, but its only check is at the end where it has to rise from the lower flue and return through the tubes ; whether ustd for sieam or hot water, this form certainly has many advantages, but for slow com- bustion I think it much better to have the return tubes not less than fourinches in diameter. They are usually made not more than three inches even in large boilers, and while it may be largeenough for steam boilers requiring a very quick draught to run at high pressure, I would prefer fewer tubes of larger size for slow combustion boilers. Many practical men who have tried the larger tubes have found them an improvement over the usual small tube. The size of the boiler must depend on the amount of work it has to do. Next to a good boiler the most impor- tant thing is a good chimney, which should be of ample size and sufficient height to cause a good draught at all times. In building the chimney many suppose that a fe
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfloriculture, bookyea
