eCTOBER 20, 1910. 



The Weekly Florists^ Review* 



77 



USE THIS SIMPLE INSTRUMENT 



AND 



Metallic Thermometer '*A* 



SizB— 6 inches hitrh, 4 Inches wide, 2 inches deep, 

 Oase made of .cast aluminum, highly finished. 



Save Your Stock 



From Destruction 



By a sudden cold snap or a rapid thaw 



U#^1^9 Because it is an at^curate, fully tested thermometer, .show- 

 ^^^^ ^' • ing the correct temperature at all times, and combines 

 a device ifehich 'will ring a bell at your bedside ^^hen the 

 greenhouse gets either too hot or too cold. Just the protection 

 you have wanted all these years. 



We guarantee that results will be obtained at all times. This device 

 has been subjected to the severest tests in our laboratory for over two 

 years, and at the same time has given entire satisfaction, under all con- 

 ditions, to many users in the trade. 



All you have to do is to set the pointers at the highest and lowest 

 temperatures you want and the thermometer will do the rest. It will 

 ring a good, loud bell when either point is reached, and saves all worry 

 over trouble from sudden temperature changes. 



INVESTIGATE IT TODAY 



isssv'" vThS^tss?? loss savers yoo need 



National Clock & Electric Nfg. Co.,st Louis, issom 



Mention The Kevitnv wh"ii you write. 



point of water, and a rapid circulation 

 tan be secured. With this arrangement, 

 one "J-inch flow under the ridge and 

 four 2-inch returns on the side walls 

 should maintain the temperature de- 

 sired. Owing to the exposed glass in 

 the end of the violet room, the tempera- 

 ture in that room will be 2 or 3 degrees 

 less than in the other room. 



PIPING IN ILLINOIS. 



I am building two greenhouses, to be 



heated by steam, and will be thankful 



tor any suggestions about the piping. 



One house is 21x100, twelve feet to the 



idge and six feet to the gutters. The 



north wall is all lumber, but the south 



nas thirty-two inches of glass and there 



s glass in the gables. The boiler will 



"6 at the west end of this house. The 



ither house is 25x125 and thirteen feet 



the ridge, and has 6-foot walls, with 



hirtj-two inches of glass in both sides 



nd glass in the gables. There is a 



pace of fourteen feet between the 



'Ouses. I shall use two flow pipes in 



ach house, so I can hang them on the 



'urlin supports. Kindly tell me what 



■ize the flow pipes should be for the 



wo houses, and how many IVi-inch 



'etuTBs will be needed for a tempera- 



ure of 60 degrees, with zero weather. 



' hare raised benches and should like 



'ome returns on the walls and some 



"nder the benches. 



I also should like to know how many 

 oorse-power the boiler must be, so I 

 'an heat two houses more, besides those 

 I am just building. The additional 

 •ouses would be the same size. How 

 deep i» the ground will it be necessary 



Mention The Review when you write. 



