Januabt 29, 1920 



Tht Florists' Review 



143 



WILKS SELF-FEEDING 

 HOT WATER BOILER 



for Economy, Durability, Dependability 



Install a WILKS 

 and forg«t your 

 troubles. 



No night fire- 

 man required— 

 as the magazine 

 or coal chamber 

 holds sufficient 

 fuel to keep fire 

 10 to 12 hours 

 without atten- 

 tion. Best made 

 for a small 

 greenhouse. 



Send for Catalogne 

 and Prices 



Telephone 

 Taxds 866 



S. WILKS 

 MFG. CO. 



3523 Shields ««e., 

 CHICAGO. ILL. 



Drip Drip 



gallons should be connected with the 

 highest point of the flow pipe. With 

 this arrangement, it will not be neces- 

 sary to use air valves when the pipes 

 run downhill. 



COAL GAS vs. COAL. 



Would it be advisable to change 

 from coal to coal gas, if I find that 

 the cost of the gas would not exceed 

 that of coalf How many cubic feet 

 of coal gas are equivalent to one ton 

 of mine-run Pocahontas coal in heat 

 value f 



Has any reader of The Review had 

 experience in burning coal gas to heat 

 his greenhouses! 



H. O. C— Wis. 



R 

 I 



A Uniform 

 Temperature 



means better flow- 

 ers— more naturally 

 crown. The More- 

 head System main- 

 tains an even, con- 

 sistent temperature 

 throughout your grow- 

 inc houses by elimi- 

 nating sluggish circu- 

 lation and delivering 

 every drop of the 

 condensation, which 

 is now allowed to clog 

 up your steam lines, 

 directly back to the 

 boiler while it is hot. 



You not only get 

 better flowers, but you 

 also save a large per 

 cent of your fuel. 



Write for 



Back-to-Boiler 



Book Today 



Stop that Slug- I 

 gish Circulation 

 in Your Steam Lines! 



WOU CAN EASILY do it! Hundreds of other 

 *• florists— sick of the never-ending bother of 

 antiquated steam pumps— have solved the sluggish 

 circulation problem permanently with the 



Mfitehead 



Big representative concerns like the Minneapolis 

 Floral Company, the Memphis Floral Company, the 

 Pittsburgh Floral Company, etc., etc., now drain 

 their steam lines and return the pure hot conden- 

 sation immediately to the boilers as feed water 

 with the Morehead System. 



Quickly and easily attached to your present appar- 

 atus, the Morehead System gives you absolute con- 

 trol of the temperature in every foot of your houses 

 —and soon pays for itself in the saving of fuel. 

 Tell us about your present heating troubles— our 

 engineers will give you expert information on ex- 

 actly what you may expect the Morehead System 

 to do for you— and send you a book which covers 

 the greenhouse steam plant situation thoroughly. 



Morehead Mfs^. Co. 



Dept. "M" 



Detroit, - Michigfan 



If a supply of coal gas can be as- 

 sured at a cost comparable to that of 

 coal, it would be worth while to make 

 the change. In the past, the cost of 



coal gas has been several times as 

 much as for the same heating value in 

 Pocahontas coal, but in some cities 

 there has been little or no increase in 

 the price of gas while the cost of 

 coal has doubled. On the other hand, 

 in most places the price of coal gas 

 has kept pace with the cost of coal and 

 it is now from $1.40 to $1.60 per thou- 

 sand cubic feet in the smaller cities. 



The number of heat units in coal gas 

 varies in different places, but in many 

 cities the franchise under which the 

 local gas company operates provides 

 for a definite number of B. T. TJ. (Brit- 

 ish thermal units) per thousand cubic 

 feet, usually 600. Even if you do not 

 have such a franchise in your city, it 

 will be possible to learn from the gas 

 company the approximate number of 

 heat units it is furnishing. 



One ton of mine-run Pocahontas coal 

 furnishes about 10,000 B. T. U. and costs 

 not far from $9 per ton in most places, 

 and when coal gas testing 600 B. T. U. 

 costs 80 cents per 1,000 cubic feet, 

 which is near to the minimum price, 

 the heating equivalent of one ton of 

 coal in the form of coal gas v^rill cost 

 nearly one and one-half times as much 

 as one ton of coal. 



With coal gas, the labor of firing 

 will be greatly reduced and there will 

 be no cinders to remove. It should 

 also be considered that the combustion 

 of the gas will be with much less waste 

 and loss than can be secured with coal. 

 However, with a quite liberal allow- 

 ance for the greater economy in the 

 combustion of the gas, for the saving 

 of labor in firing and the removal of 

 ashes and for the doing away with 



