FIFTEENTH ANNUAL YEAR BOOK— PART X 725 



Tlie floors may be differently arranged depending upon local conditions, the 

 preferable sliding entrance door is pictured in figures 14, 15, 17, 20 and 21, 

 whereas the swinging top hinged door is shown clearly in figure 19. It may be 

 advisable to put three hinges, thoroughly reinforced with battens, on doors that 

 swing at the top in order to make them more durable. 



If entrance door larger than 22"x26" is desired for tall swine, make house 

 higher and wider to allow for same. 



Manifestly one disadvantage of the "A" house is that there is but little prac- 

 tical choice in the selection of a door site. It must necessarily be placed in the 

 lower middle of the ends. 



The side, shade or sun doors had best be on the east side when the entrance 

 door faces the south, or on the south side if the entrance is on the east. With 

 such doors on the east advantage is taken of the early morning .sunshine, which 

 is much more effective than from the afternoon sun when one is sheltering 

 suckling pigs. 



It is quite desirable to sometimes make the side doors double (see figures 20 

 .n.nd 21) in that one can close the lower portion to facilitate the handling of sow 

 and pigs. The double doors are shown wholly and partially open in the self-ex- 

 planatory photographs (see figs. 20 and 21). 



The ventilators may be constructed in various manners. The improved venti- 

 lators as constructed in the gable ends just under, the comb of the house (see 

 figure 14) are satisfactory in that they give systematic ventilation and present 

 a very attractive appearance. Another type consists of a false comb or small 

 cap which fits the opening in the ridge near the middle point (see figure 19). 

 This fal.se comb or cap may be inade to extend throughout the entire length of 

 the house, but care should be taken in fitting the side roof doors to allow suffi- 

 cient clearance. All of these ventilators are efficient. 



The serious disadvantage of the "A" type of house is that it does not effec- 

 tively furnish shade on the hot days of summer. To offset this disadvantage 

 we are presenting an "A" house with side doors hinged at the top (see figs. 22, 



23, 24, 25 and 26), a house which is somewhat better for svmimer thah the 

 regular "A" type house just described. 



"A" noiJHE moons hinged at top). 



This type of house differs from the other "A" house presented in that the 

 side doors are hinged at the top in order to pi'ovide shade. (See figures 22, 23, 



24, 25 and 26.) This type of house is used in the South, being somewhat similar 

 to design proposed by the Mississippi Experiment Station. 



If one wishes an "A" house to be constructed so as to provide some shade 

 this method of hinging the doors seems to be the only favorable solution. . One 

 cannot satisfactorily hinge the ends so as to form a horizontal shade device as 

 in the Iowa and Ames types because one end Is broken by a door and the other 

 is usually on the north side where shade is already present. If the "A" house 

 faces the east then such a shade-lift provision may be made on the west end. 

 The side door hinged at the top is not as effective a shade device as the hori- 

 zontal shade doors on the Iowa gable and Ames combination roof types. One is 

 compelled to maintain the doors at too great a distance from the ground, thus 

 reducing the shaded area, furthermore most of the front portion of the house 

 when facing the south is not protected from the direct rays of the sun. The 

 shaded area is likewise quite variable, moving as it does in accord with the 

 circling sun. 



The heavy shade doors are somewhat unhandy to manipulate and do not 

 easily permit of sunning of the interior of the house so essential in the raising 

 of early spring and late fall litters. Taking everything into consideration, how- 

 ever, this type of shade construction in the "A" house is as efficient as any so 

 far proposed. 



The side doors are best held up by means of supports which are firmly at- 

 tached to the rafters of the frame by means of bolts (see figure 26). It may 

 be advisable to attach the top end of these supports while in service temporarily 

 to the roof shade door in order to keep same from lifting when strong winds 

 blow. The shade doors may be held up by means of heavy wires attached to 

 eye bolts in the ends of the doors and close to the ridge of the roof, but one 



