EXPERIMENT STATION BULLETINS. 261 



is well lighted, but the main part is not exceptionally so, despite the 

 large amount of glass used. The new horse barn, 48x94 feet, with a floor 

 area of 4,512 square feet, has 200 square feet of glass, or 1 foot to every 

 22.5 square feet floor space. The pure bred sheep barn, 34x90 feet, with 

 a floor area of 3,060 square feet, has 105 square feet of glass, or 1 foot to 

 every 29.1 square feet floor space; this building seems well enough lighted 

 with its smaller glass area, but this may be because of its narrowness. 

 The experimental sheep barn, 34x60 feet, with 2,040 square feet floor area 

 and 45 square feet glass, or 1 foot to 45.3 feet floor space, is not well 

 lighted. The piggery, 34x80 feet, with floor area of 2,720 square feet, has 

 119.5 square feet of glass, or 1 foot to every 22.7 square feet of floor. The 

 farmer's barn heretofore referred to as being so exceptionally well 

 lighted belongs to J. W. Hibbard, of Bennington, Mich. It is 58x62 feet, 

 with 3,596 square feet floor area and 210 square feet of glass, or 1 foot to 

 every 17.1 feet of floor space; on the other hand, however, we located a 

 basement barn in this state 40x46 feet, with 1,840 square feet floor area, 

 having only 15.7 square feet of glass, or 1 foot to every 117 feet of floor 

 space; the windows of this barn were typical of the common basement 

 equipment, each consisting of three 9x14 inch lights placed in the wall 

 directly below the sill. From the foregoing data it would seem safe to 

 conclude that as a general rule, a well lighted stable should have about 

 1 square foot of window light to every 20 to 25 square feet of floor surface, 

 depending on the amount of glass that can be jilaced in south, east and 

 west exposures. 



Keferring again to Figure 38, on the west side of this building there 

 are four windows with sash measurements of 3 feet 7 inches by 4 feet 

 9 inches, each containing fifteen 10x12 inch lights, and also a fifth one 

 3 feet 7 inches by 3 feet 9 inches with twelve lights. These were dis- 

 tributed as evenly as possible without cutting posts and girts such as 

 are numerously found in an old fashioned timber framed barn. Another 

 window could not have been put in the space between the two 

 doors at the north end without cutting a large bent post, but this diffi- 

 culty was overcome by placing three twelve light windows in the north 

 end. On the east side along which an eight foot alley runs the entire 

 length of the barn, there are four fifteen light windows, the addition of 

 one more would be desirable, but was prevented by the construction of 

 two circular silos on that side of the barn. The south end of this build- 

 ing adjoins the grade herd barn. 



The bottoms of the window sills are 4 feet 6 inches above the stall 

 floor and the top of the casing is 15 inches below the ceiling. We consider 

 the size and location of these windows very satisfactory, and favor them 

 strongly because of the amount of light that they admit and because 

 they are high enough from the ground outside and from the floor within 

 to prevent breakage by cattle. Long narrow upright windows are not 

 desirable; for instance, we found one dairy barn fitted with this sort, 

 with casement measurements 4 feet 6 inches high and 2 feet wide, with 

 upper and lower sash each containing four 10x12 inch lights; this style 

 of window is too narrow to allow the light to spread and so low as to 

 be subject to frequent breaks. Pairs of these windows, side by side, but 

 separated by studding, are not so satisfactory as the single large fifteen 

 light window heretofore described. The windows in the barn under 

 discussion are pivoted in the center at the ends, with wooden stops so 



