'<5^ JAMGS bJAY 



289 



James Ventilators with 

 Solid Hood 



Fig. 1 



James Solid Hood Ventilator 



Fig 



James Revolvmg H' 



specifically ordered, 

 additional. 



These ventilators differ in principle from 

 the James Ventilator with revolving hood 

 only insofar as the inverted cone is substi- 

 tuted for the revolving top. 



The ventilators without the revolving 

 hood are, of course, somewhat less efficient be- 

 cause the larger outlet space of the revolving 

 head and the added motive power of suction 

 obtained through the intensifier is not used. 



Nevertheless they are very efficient ventilators — more so 

 than any other ventilator now on the market for dairy barns. 

 They are built on strictly scientific principles, made of 

 the same high quality materials and of the same class of 

 workmanship as the James Ventilators with revolving hood. 

 The inverted cone "A", Fig. I , turns the air rising from 

 the outtake flues outward and upward. 

 There is no opportunity for the outflow- 

 ing current of air to turn back upon itself, 

 cause eddies, choke the flue, or interfere 

 in any way with the free escape of foul 

 air. The storm band and the skirts keep 

 out snow and rain and make the ventila- 

 tor proof against the wind. 



All openings are protected by galvan- 

 ized bird-proof netting. 

 Ventilators Nos. 3 and 4, as shown in Fig. 4, 

 page 290, are furnished with weather vane. 



The Ventilators with bases sho\vn in Figs. I , 2 

 and 3, will be furnished with weather vane if 

 desired at an extra cost. Any of the six figures 

 shown on page 292 may be selected. The cow 

 figure will be furnished unless another style is 

 Any name or date will be stenciled on a ventilator base lor $1.00 



entilator 



Size of James Ventilator to Buy 



Size 



12" 

 18" 

 24" 

 30" 



WITHOUT REVOLVING HOOD 



Hogs 

 10 



24 

 42 

 64 



WITH REVOLVING HOOD 



4 

 9 

 15 



23 



Horses 



3 



7 



12 



17 

 26 



Horses 



13 

 20 



Hogs 



72 



Length of Building 



(Building not over 36 ft. wide) 



1 to 35 feet One 24 inch 101 to 125 feet Three 24 inch 



36 to 50 feet One 30 inch or two 24 inch 126 to 150 feet Three 30 inch or four 24 inch 



51 to 75 feet Two 24 inch 151 to 175 feet Four 24 inch 



76 to 100 feet Two 30 inch or three 24 inch 176 to 200 feet Four 30 inch 



