116 



The Florists^ Review 



Dkckmbeb 23, 1920 



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 neededtemperatures 

 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. 



RECORD COAL PRODUCTION. 



For the second time in a fortnight pro- 

 duction of soft coal has made a new 

 maximum for the year. The output dur- 

 ing the week of December 11 is esti- 

 mated at 12,865,000 net tons, an increase 

 of 33,000 tons over revised figures for 

 tlie preceding week, which up to then 

 was the record. The output the week of 

 December 11 has been exceeded but three 

 times in the history of the country, the 

 weeks of July 13 and September 28, 1918, 

 and October 25, 1919. 



The week of December 11 was the 

 tenth in .a period of sustained heavy 

 production which has been equaled but 

 once before and that in the summer of 

 1918, when the zone system, car pools 

 and other war-time measures designed to 

 stimulate production were in force. 



The present rate is far above that in 

 the corresponding period in any of the 

 three, years preceding. It is the more 

 remarkable because, effective November 

 29, the last measure of priority in the use 

 of open-top cars was withdrawn. 



Cumulative production for the calen- 

 dar year 1920 up to December 11 now 

 stands at .'j2.'5,403,000 net tons, or at the 

 rate of 1,799,000 tons per working day. 

 If this rate be continued for the sixteen 

 working days remaining, the total output 

 for 1920 will be 5.54,000,000 tons. 



Production during the first 293 work- 

 ing days of the last four years has been 

 as follows, in net tons: 1917, 525,365,- 

 000; 1918, 556,343,000; 1919,431,091,000; 

 1920, .525,403,000. 



In bituminous production 1920 is rap- 

 idly gaining upon its predecessors. It 

 is within 31,000,000 tons of 1918, but this 

 does not mean a great deal, because in 

 that year production exceeded consump- 

 tion and jirovidod for a net addition to 

 consumers' stocks of more than 30,000,- 

 000 tons. Neither does it signify that 

 1920 is far ahead of 1919, for in 1919 

 production fell short of consumption and 

 consumers used up the extra stock they 

 had acquired in 1918. It is particularly 

 significant to note that 1920 has now 

 passed 1917, a year when requirements 

 were large and production about equaled 

 consumption. 



PIPING FOR A NEW HOUSE. 



Wc contonii)late building a green- 

 house 25x85 feet, with 7-fo(it walls with 

 four feet of glass. Both the gables will 

 be glass and the roofbars will be four- 

 teen feet long. The building will extend 

 east and west. The boiler will be placed 

 in the northwest corner, separated by n 

 glass partition. It is an 8-section Pear- 

 son Ideal. We also have 500 feet of IVi- 

 inch black pipe, which we should like 

 to use for our hot water system. Will 

 you please tell us how to pipe this 

 nouse? We shall not use benches; so 



^^A Merry Christmas 



and a Happy New Year*^ 



m 



|HE spirit of the sea- 

 son prompts us to 

 express to you ap- 

 preciation of our pleasant 

 business relations during 

 the past year and to most 

 heartily wish you health 

 and prosperity for the com- 

 ing year. 



KROESCHELL BROS. CO. 



444 West Erie Street 

 CHICAOO 



