144 



The Florists' Review 



March 17. 1921. 



Greenhouse Heating 



Subscribers are invited to write the 

 editor of this department with regard to 

 any details of greenhouse heating that 

 are not understood. When information 

 is desired regarding the capacity of boil- 

 ers, or the amount of radiation required 

 for a greenhouse, the needed temperatures 

 should be stated in the inquiry, as well 

 as the amount of glass in the side walls, 

 and the dimensions and general arrange- 

 ment of the greenhouses. It is often help- 

 ful, also, to have a sketch showing the 

 location of the houses. 



COAL MARKET AT SLOWEST. 



So little is stirring in industry that 

 the railroads and the shippers of coal 

 have less to do than at any time in the 

 last six or seven years. Coal companies' 

 are figuratively tightening up their belts 

 and sitting tight. The spot market is 

 quotable more because of prices offered 

 by shippers than by business closed. 

 There seems to be a general feeling — 

 possibly founded on hope — that the 

 buyer is going to stay out of the market 

 until the last minute and that when he 

 does start to buy the rush will produce 

 another sharp upward swing in prices 

 and that next fall will witness a repe- 

 tition of serious car shortage, according 

 to Coal Age. 



Opinion is not divided on the question 

 of whether a strong demand next fall 

 will produce a car shortage, but there 

 is no unanimity in the views of different 

 authorities as to whether the demand 

 will materialize. It is being pointed out 

 that the railroads, like the mines, are 

 curtailing operations and releasing per- 

 sonnel and that if orders for coal and 

 for coal cars are suddenly revived with- 

 out warning, difficulty will at first be 

 experienced in meeting the demand. 



The production of bituminous coal, 

 which for several weeks has been at a 

 rate in excess of 7,000,000 tons, is con- 

 sidered to have reached bottom for the 

 present, but lower figures are anticipat- 

 ed in April, when many of the contracts 

 on which coal is now being shipped will 

 have expired. To a limited extent some 

 of the larger shippers have been able 

 to renew these contracts, but they re- 

 port tliat consignees for the most part 

 hold out no assurance of taking more 

 than the barest minimum quantity for 

 the next few months. 



INSTALLINO NEW BOILEB. 



My greenhonse is 40x80 feet. The 

 side walls are eight feet high, four feet 

 being of glass. It is twenty feet to the 

 ridge. The house is heated with hot 

 water. There are two 3-inch flow pipes 

 and thirty 1 i^inch returns. The heat 

 does not seem to work right, so I should 

 like to put in a new boiler. I desire 

 a temperature of from .1.') to 60 degrees 

 in weather 20 dogrees below zero. I 

 should also like your advice as to the 

 piping of a small house, 22x35 feet, 

 with 6-foot side walls, which is to be 

 used for ferns and palms. How should 

 I figure the radiation and how many 

 1%-inch returns to a 3-inch flow? 



C. L. S.— Wis. 



For ordinary winter temperatures 

 the radiation stated is not far from 

 correct, but for 20 degrees below zero 

 we should increase it fifteen per cent. 



However, we cannot ascribe the un- 



WHCN YOU BUY-GET A KROESCHELL 

 'THE BOILER OF UNEQUALED FUEL ECONOMY' 



(>VA.«1r 



The immense amount of direct self-cleaningf heating^ 

 surface and the thin vertical waterways cause this 

 type of boiler construction to heat water quicker than 

 any other form of boiler. 



Hundreds of Ploiists" Review readei-s are using; the 

 Kroesfhell Boiler and mighty is their praise. The 

 year of 1920 has brought us an enormous number of 

 new customei-s who have seen our boiler in operation 

 at other places. We attribute the large sales of this 

 season to the good work the Kroeschell Boiler is doing 

 everywhere. With our policy — "the customei-s' in- 

 terest tirst"" — perfection of construction — factory to 

 user prices— honest and "true blue" boilei- ratings — 

 you simply cannot lose. 



PLACE YOUR ORDER -DO IT TODAY 

 TELEPHONE OR TELEGRAPH AT OUR EXPENSE 



KROESCHELL BROS. CO., 



444 W. Eri* Straat 

 CHICAGO, ILL. 



