«64 



HORTICULTUEE 



December 12, 1914 



Est. 1765 



Pot Makers for a 

 CMitury anda Half 



tt 



UUOK" Kji 



HEWS 



STANDARD 



POTS 



Inc. 1904 



World's Largest 

 Manufacturers 



.IMI 



e-ri-iE:iM\A/^yvi 



:c?iA.i--rii 



^^h^z^^l:'"'- A. H. HEWS & CO., Inc., Cambridge, Mass. 



WArebonses: 

 CAMBRin(;E, MA.HS. 

 LONU ISLAND CITY. N. T. 



MAXIMUM LIGHT IN THE GREEN- 

 HOUSE. 



The intensity of the sun's rays is 

 greatly modified by the angle at 

 which they strike glass as well as by 

 the thickness and character of the 

 glass itself. It has been proven that 

 about 12 per cent, of the light rays 

 are intercepted. As the amount lost 

 by reflection depends upon the angle 

 at which the rays strike the glass, the 

 careful adjustment of the angle of the 

 roof should be studied. 



When rays of light fall upon sheet 

 glass at a right angle, they pass 

 through without being turned from 

 their course and there is no loss save 

 the 12 per cent, absorption. When 

 they meet the glass at an oblique 

 angle, a portion of the rays are re- 

 flected and the intensity lessened. 

 The following table shows the amount 

 lost by reflection at the different roof 

 angles: 



Angle of ray. ... 60 



.... 50° 



.... 4.5° 



.... 40° 



.... 30° 



.... 25° 



.... 20° 



.... 15° 



.... 10' 



.... 5° 

 During the s 

 when the sun is above the horizon 

 less than 10 hours, as many rays as 

 possible should be trapped, especially 

 before 10 A. M. and after 2 P. M. At 

 the winter solstice the sun rises 

 about 25 degrees above the horizon 

 at noon and the slope of the roof 

 should be such that the amount of 

 light reflected should be the best pos- 

 sible. When the pitch of the roof 

 brings the glass at an angle of 20 

 degrees, the sun at 5 degrees above 

 the horizon will strike it at a 25 de- 

 gree angle, and 16 per cent, of the 

 rays will be reflected, in addition to 

 the 12 per cent, absorbed by the glass. 

 Had the roof been given a pitch of 

 30 degiees. the sun at 5 degrees 

 above the horizon would strike the 

 roof at an angle of 40 degrees, but 

 5.7 per cent, of the rays would be lost. 

 •or only one-third as many as were 

 reflected at a slope of 20 degrees. 

 Other practical things must be con- 

 sidered in determining the angle of 

 the roof. Increasing the angle also 

 increases the height of the ridge and 

 consequently the area to be heated. 

 The south roof is usually at an angle 

 of 30 to 35 degrees. 



COKE FOR GREENHOUSE HEAT- 

 ING. 



Editor Hobticultcre: 



Dear Sir: I write you lo find out about 

 coke for greenhouse Leatlnj?. Is It any 

 good for heating where you don*t have a 

 night fireman y Is it any good to keep up 

 steam? I have one steam boiler and one 

 hot water, but don't have any night man. 

 If you can tell me anything about it I 



DREER'S "Riverton Special" Plant Tub 





.M a U u f a 



-ind (-heap 



drop handles. 



20 18 In. 



30 16 Id. 



40 14 in. 



50 12 in. 



fiO 10 in. 



70 8 In. 

 tured for us exclusively. The best tub ever Introdii-'Pd. The neatest, lightest 

 est. Painted green, with electric welded hoops. The four largest sizes have 



No. Diam. Ea. Doz. 100 

 10 20 in. $1.45 $16.00 $1.W.00 

 1.30 14.00 115.00 

 1.00 

 .65 

 .45 

 .38 

 .30 



11.25 

 7.0O 

 5.00 

 4.00 

 3.50 



92.00 

 56.00 

 40.00 

 32.00 

 2a 00 



HENRY A. DREER, seeds . Plants. Buiis, and Supplies, 714 ctiestnut Street, Philadelphia, Pa. 



IIHIO REAI>V PACKED CRATES 



STANDARD FLOWER POTS AND BULB PANS 



can he shipped at an hour's notice. Price 



Id. ® $4.60 



•• " 5.J4 



•• " 4.81 



" " 3.7» 



•• " 3.M 



" ■• 4.IC 



'• " S.O(i 



HILFINGER BROS., Potfery, Fort Edward, N.Y. 



titist Rolker I Sons, SI Bartby St., N. Y. City, Afiots 

 0<l SPIClun — UitDlstucaa* TridiE«irt 



The best PAPER 

 POT for shipping 

 purposes. Sizes from 

 2 In. to 6 In. 



Ask your dealer for 

 them. Samples fre«. 



E. ALLAN PEIRCE. 



401 Oaks St., 

 Waltham, Mass. 



would be pleased to know how it would 

 work. yours truly. 



Conn. W. H. W. 



We would not advise the use of 

 coke under the conditions as given. 

 Anthracite coal is your safest fuel. 

 Coke requires much more frequent at- 

 tention than coal and without a night 

 man to attend to it, would not be re- 

 liable. We know that among the 

 greenhouse people around London, 

 England, coke is used almost univer- 

 sally, but they have a much milder 

 climate there than we have in this 

 section of the United States.^En. 



GREENHOUSES BUILDING OR 

 CONTEMPLATED. 



Calla, O. — A. B. Sigile, rebuilding. 



Ashton. III. — Oscar Schade, house 

 24 X 100. 



Webster, N. Y. — Mr. Mossgraber, 

 house 21 X 75. 



Darien, Ct. — Stephen Mather, Gracie 

 street, one bouse. 



South Milford, N. H. — A. .1. Carle- 

 ton & Son. house 20x100. 



Wrentham, Mass. — Earl Metcalf, 

 South street house 20 x 60. 



Bridgeport, Ct. — -Park Gardens and 

 Flower Shop, house 11 x 180. 



Lowell, Mass. .John S. Haynes Es- 

 tate, 1328 Gorham street, house 31 x 79. 



Anamosa, la. — Bagley Floral Co., 

 Garnaville and Webster streets, one 

 house. 



KING 



The name that assures "the 

 most for the money" in 



GREENHOUSES 



Write for Bulletin No. 47 

 and you will see why. 



KING CONSTRUCTION CO. 



28 King's Road, N Tonawanda, N.Y. 



SPRING IS COMING! 



and when it does come there will be 

 a whole lot of folks wishing they had 



Installed 



Skinner Irrigation 



for the economical and proper water- 

 ing of nil growing crops, flowers or 

 lawn. 



SAVE MONEY BY DOING IT NOW 

 GEO. N. BARRIE 



BROOKLINE, MASS. 



Sead your business direct to Wastunfftoou 

 Saves time and insures better service. 

 Personal attention guaranteed. 

 Thirty years active service. 



SIGGERS & SIGGERS 



PATENT LAWYERS 



Box 9, National Union Building 

 Wa«h!ngton, D. C. 



—STANDARD FLOWER- 



oo:'® 



If your greenhouses are within 5(X) mllta 

 of the Capitol, write us, we can save 

 you money. 



W. H. ERNEST 

 — -iSth & M Sts. WaHhlDRton, D f-^ 



