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The Weddy Fbrists' Review. 



Fbbbuaky 2, 1911. 



TO MAINTAIN AN EVEN TEMPERATURE IN YOUR GREENHOUSES, USE A 



Foster Pressure Regulator 



With this simple device attached to your steam main just inside the greenhouse the pres- 

 sure on the heating coils will be absolutely constant, anywhere from 1 to 16 pounds (whatever 

 the grower sets the Regulator at), no matter how the pressure on the boilers runs up and down. 



If the weather chancres, or the sun heat varies, instead of turning on more pipes, just turn a nut on the 

 Regulator, and get more steam, or less steam, at once. Made in sizes from %-inch to 10-inch just for this work. 



" The Foster Pressure Regulators which have been installed In our greenhouses are giving 

 perfect satisfaction."— Peter Relnberg. Chicago, March 16, 1910. 



-Write for circulars and prices- 



We manufacture a 



State vour conditions ; it will give us pleasure to help you if we can. 

 large number of steam specialties. 



Foster Engineering Co., Newark, N. J. 



Mention The Revipw when you write. 



Greenhouse Heating. 



THE COAL MABKET. 



Heavy stocks have accumulated at the 

 mines and much coal is in transit, and 

 there is a tendency on the part of bitumi- 

 nous coal operators to close down their 

 mines rather than operate at the pres- 

 ent low prices, which they characterize 

 as too close to the cost of production. 

 Prices show a slight hardening in con- 

 sequence of the attitude of the operators 

 and it is predicted by jobbers that there 

 will be a slight advance from now on, 

 ruling quotations being 35 to 40 cents 

 per ton lower than normal for this season 

 of the year. Prices at the mines are 

 about as follows: 



Illinois — Steam lump, |1 to $1.15; mine ruD, 

 90 cents to $1.05; lV4-lnch screenings, 66 cents 

 to 75 cents; egg, 90 cents to $1.05; nut, 85 

 cents to $1.05. 



Indiana — Steam lump. $1 to $1.15; mine run, 

 95 cents to $1.05; 1 14 -inch screenings, 65 cents 

 to 75 cents; egg, 90 cents to $1.05; nut, 85 

 cents to $1.05. 



Ohio Hocking— Steam lump, $1.40 to $1.65. 



West Virginia smokeless — Mine run, 85 cents 

 to $1.15. 



CRUDE OIL AS FX7EL. 



I saw on page 78 of The Review for 

 January 26 an inquiry by J. B. about 

 using crude oil for heating. I used fuel 

 oil (the heaviest I could got) last win- 

 ter and this and would not think of 

 using anything else. It depends on the 

 kind of burner he gets and, as there 

 are 60,000 patents, more or less, on oil 

 burners, he has plenty to choose from. 



The burner I use is made by F. L. 

 Clark, 917 Splitlog avenue, Kansas 

 City, Kan. It is safe as to fire and 

 there is practically no danger of any 

 explosions when using the heavy fuel 

 oil. Crude oil, or oil as it comes from 

 the well, is very combustible and should 

 be used with great care. L. C. Fields. 



BOILER HIGHER THAN RETURNS. 



I have two greenhouses, adjoining 

 each other. One is 16 x 42 and the 

 other 28 x 70. There are two 3-inch 

 flows under the ridge and five 2-inch 

 returns on the side posts in the larger 

 house, and one 3-inch flow and four 2- 

 inch returns on each side wall in the 

 smaller house. The boiler is sectional, 

 with the sections standing perpendicu- 

 larly. There are twelve sections and 

 the boiler is rated to heat 2,300 feet of 

 4-inch pipe. The boiler is in a pit, but 

 the top of it is about two feet higher 

 than the lowest return pipes. The 



SEND FOR 



Free Instruction Book 



This book tells how to make 

 permanent repairs to boilers, 

 tanks, piping, etc., and how 

 to make greenhouse iron pipe 

 joints, using the well-known 

 Smooth-On iron cements. 

 Every florist should have a 

 copy at once. 



Smooth-On Mfg. Co- 

 jersey CITY, N. J. 



CHICAGO WABEH0D8E, 881 N. Jefferson St. 

 SAN FBANCISCO WABEHOUSE. 94 Market St. 



Mention Itw Keview wneu vou write 



SacceBRors to the 

 John Davis Company 



No lots from sudden drops in 

 temperature if you use the 



Hughson Regulating Valve 



In connection with a steam beating plant. Carrr iO or 

 50 pounds pressure on the boiler and set tbe valve for 6 

 or 10 pounds— it will do the rest. You'll be free from 

 worrv this winter, if you follow this advice: " Install a 

 Huffhson Reerulatlns; Valve when making your 

 repairs " Ask lor our Catalosrue, which also sbowi 

 Steam Traps and other devices. 



HUGHSON STEAM SPECIALTY CO. 



5021-5023 S. State St., CHICAGO, ILL. 



highest point of the system is over the 

 boiler and all pipes .decline from this, 

 but we cannot get satisfactory results. 

 The water boils near the boiler, but 

 does not circulate satisfactorily. "Will 

 it be necessary to sink my boiler deeper, 

 or wliat can be the matter? How much 

 decline is necessary in 70-foot flows? 



S. A. M. 



The simplest manner of piping a 

 greenhouse is to have tlie top of the 



heater lower than the lowest part of 

 the returns. To bring this about, it 

 may be necessary to sink the heater, 

 but if the arrangement of the heating 

 coils is such as to make it possible to 

 raise them, this will probably be the 

 easier way. A closed system could also 

 be used to good advantage. The slope 

 of the pipe need only be enough to free 

 it from air, and one inch in twenty feet 

 will often answer, if the pipes are 

 accuratelv leveled. 



