294 



The Weekly Florists' Review. 



face, and on this basis 11.5. or. dropping tile 

 fraction. 12 feet of lieating surface In a hori- 

 zontal tubular boiler are able to furnish steam 

 for one horse-power. 



The tollowine table shows the relation of 

 horse power and lieatins surface in different 

 types of boilers (From Ste.im Boiler. Peabody 

 and Miller. New Torl<. lS9s?,): 



Lancashire S to JO 25 to 30 .30 7.0 



Horizontal tubu- „„ ,, . 



lar 8 to 15 35 to 40 .30 11.5 



Vertical Manning.lO to 20 4S .23 11.1 

 Locomotive type 



(etc) ....Stol5 40 to 45 W 12 6 



Scotch Marine ...35 to 46 30 11 3 3 

 Water Tube, with 



cylinder lo 15 35 to 45 i, 110 



Pounds of Coal Per Horse Power and Per 

 Pound of S:eam. 



regarding (I) the amount of each kmd of 

 coal reQuired to evaporate one pound of wa 

 ter, and. (2) the amount of each kind of 

 coal required to produce a horse power per 



n From and at 212 Degrees 

 Fahrenheit. 



Per Per pound 

 pound of com- 

 of coal, bustlble. 



nitrede. Eagle, 

 Mt. Carbon). ..8.76 



m. Mine Run).. S. 05 

 (Jellico, Mine 



burg coaH 

 ginia coaK 

 the Pitt lu 



three paits g 



- ^rl0m^ 





Portion of Herbaceous Border at the Pan-American Expositio 



Exhibit of H. A. Dreer. 



I published in 

 erican Society 



whic 



ving 



elhciency of the different 



Steam per 



at 212 degrees. 



Cumberland 10.16 



I^ckawanna anthracite 8.78 



N. S. culm 8.21 



N. S. culm 1 part, pea and 

 dust 2 parts 8.59 



Another Test Shows : 



should be no d 

 Location has 



In cstlmatine 



value of the coal, Lehigh 



From the above tables It will be seen that 

 Cumberland coal averages very well with the 

 best Lehigh broken and egg coal, and consid- 

 erably higher than Lehigh chestnut, or the 

 Lackawanna coals, and that the mixtures of 

 the One anthracite coals with Cumberland bi- 

 tuminous coal have a heating value that ap- 

 proaches within 30 per cent of that of the 

 Cumberland coal. It is well known that the 

 temperature of the gases of combustion Is 

 considerably lower in the case of fine coal 

 than when the coarser coals are burned: hence' 

 unless forced draught is used a considerable 

 Increase Is necessary in the size of the boiler 

 and the grate area should be at least 25 per 

 cent greater. 



When fine coal 1 

 on the grate in 

 somewhat shorter 

 coal, and the slh 

 frequently. This 



lurned It should be thrown 

 n layers and at intervals 

 an is necessary for coarse 

 bar should be used quite 

 II not only considerably 

 f firing, but will make a 





Selection of Coal. 



■ffect m many places in tl 

 i coal that is to be used. 

 ,e west especially, as the 

 purchase coal mined In tl 



This is 

 e it is 



upon coal brought from Pennsj-Ivania or West 

 "Virgmia Except m localities where they can 

 be deli\ ered 1)> boat, these coals will have 

 little sale west of the Mississippi, and the 

 s ime IS true in many sections in Ohio. Indi- 

 ana Illinois and Michigan. 



Dr P H Thurston (Engine and Boiler 

 Tests page 22) says: "Other things being 

 pqual tht fuel which gives the greatest quan- 

 lit\ t iNailib'e heat for the total money ex- 

 1 n litiii I \ Its complete combustion in such 



mini 1 1 t gi\e the highest possible tem- 



In tht i\ the best fuel is the one that con- 

 tains ot Its kind the largest amount of avail- 

 able combustible material, but, from the 

 standpoint ot the florist or r.ther consumer, 

 the cost should be faken into account and this 

 will include not only what is paid for the fuel, 

 but the expense for hauling and storing, and 

 of firing the buileis. including the removal of 

 the ashes 



Where low freight rates can be secured. Po- 

 cahontas and other flrst-class West "V irglnla 

 coal is rated at about 9.5 pounds of steam 

 from and at 212 degrees per pound ot 

 may be cheaper than Hocking Valley 

 son Hill. Owosso. Bay City, or other Ohio 

 and Michigan brands which will not make a 

 showing of more than_8 pounds of steam per 



Jack- 



consideration. While 

 egg anthracite may be desirable in plants so 

 small that a night fireman cannot be afforded, 

 the choice will generally be between the Cum- 

 berland and Pittsburg coals, the former of 

 which shows an average combustible value 

 about 10 per cent greater than the other. 



In sections near the mines, or where low 

 freight rates can be secured, the finer grades 

 of anthracite may be used as the basis of the 

 fuel. The objection to this grade of coal as 

 fuel has already been pointed out. The ' 





;ing 



the 



or other fine 



are needed and. by the use o 

 the occasional use of the si 

 can be obtained without usinj 

 In plants of the largest siz 

 saving can often be made 

 when screenings can be chei 



Coal for Greenhouse Ranges of Different 

 Si«es. 



As will be ■'een by the progiam a request 



W. Hill. 

 Galloway 



