ipi8 

 Essentials of Air-Cooled, Etc. 



Continued from page 5. 



but not practicable ventilating system 

 would provide for the removal of the 

 storage house walls every night. In our 

 practical storage house we are limited 

 by the requirements of reasonable ex- 

 pense and the necessity for supplying 

 walls of considerable strength. How 

 can we approach the ideal system and 

 yet meet practical requirements? The 

 windows for the intake of cold air may 

 profitably be made 24x36 inches, and 

 one such opening should be provided 

 for every ten feet in length as well as 

 width on each side and end of the 

 house. The intakes should open be- 

 neath the false floor. In an above- 

 ground storage house this makes it 

 necessary for the false floor to be con- 

 structed above the level of the win- 

 dows. In basement storages the same 

 result can be attained by encasing the 

 windows with air ducts leading from 

 the top of the windows to the level 

 of the false floor. Insulated shutters 

 hinged at the top should be supplied 

 for all windows. The false floor should 

 be at least eighteen inches above the 

 earth or concrete floor, and a greater 

 height is desirable. A very satisfactory 

 decking is made of 2x4's laid fiat and 

 spaced one inch apart. A warning in 

 regard to the strength of the floor sup- 

 ports is necessary. In one of the houses 

 built in the summer of 1917 the archi- 

 tect was instructed to figure a floor con- 

 struction capable of supporting a load 

 of fruit stacked twelve boxes high, the 

 weight per box being estimated at forty 

 pounds. The instructions were not cor- 

 rect, because the weight of a box of 

 packed apples is more than forty 

 pounds. The architect recommended 

 2xl2-inch fir joists laid sixteen inches 

 apart over a span of twelve feet. This 

 construction probably was as light as 

 he dared make it. Fir joists could not 

 be secured at the time and in order to 

 complete the house before apple har- 

 vest pine joists were substituted. When 

 harvest did arrive the apple crop was 

 ['mind to be unexpectedly large and a 

 car shortage set in, which made it nec- 

 essary to stack the apple boxes more 

 than twelve high, and a part of the floor 

 collapsed. This is only one example of 

 the bad results which come from weak 

 ('.instruction. Th ■ next important con- 

 sideration is the outlet flues. They 

 should be constructed along the central 

 line of the building, in order that the 

 greatest possible height may be reached 

 before passing through the roof. To 

 obtain free, abundant circulation the 

 openings musl be of liberal size, ami the 

 air shaft musl be straight and direct. 

 We are recommending shafts three feet 

 square for every Hiirty feet in length 

 as well as breadth. For larger build- 

 ings larger flues are necessary, and if 

 the length exceeds forty feet two flues 

 should be supplied. Trap doors should 

 be placed in the inlet opening at the 

 bottom of the Hue and in the outlet 

 opening at the top. 



As I have pointed out before, the cold 

 air nutside the storage house is only 

 slightly heavier than the air inside and 

 at best the flow of the air through the 



BETTER FRUIT 



Page 23 



; I 



First Aide to Hostesses 

 Who Know 



PERHAPS it's only a couple of 

 friends who drop in for a little 

 chat. Or— it may be a knitting party, 

 an Aid Society meeting or what not. 

 Or — who knows? — perhaps it's a big 

 "party" — music and dancing and 

 Japanese lanterns and all that. 

 In any event, don't overlook the help Ghir- 

 ardelli's can give you. Whether it's two 

 cups for yourself — or two gallons for your 

 " big affair" — you can make it just as easily. 



Just one reason why Ghirardelli's has al- 

 ways been first aide to hostesses who know. 



In M lb., 1 lb. ami 3 lb. carts; a 



tablespoonful — one cent' ' s ivorth — 



makes a cup. 



D. GHIRARDELLI CO. 



Since 1852 San Francisco 



i 



% : : 



Ground 

 Chocolate 



Get 'em Quick! 



Rid your place oi squirrels, gophers, prairie dogs, etc. Do 

 ft now when the young oi these crop-destroying pests are 

 be?ng born. It's easy and cheap-when the ground is lull 

 ol moisture to 



Exterminate Squirrels and Gophers 



and other rodent pests. Just gas them with Carbon B« suI P hi * c 

 Used and recommended by U. S. and State oltlc.als tor •«*«'" 

 ciency and economy. Simple to handle-sale. Write today lor 

 prices and folder telling how Carbon Bisulphide works. 



Wheeler. Reynolds & Stauffer ^^?^ 



627 California St., Sau FranclKCO, Cal. 



CARBON BISULPHIDES 



WHEN WRITING ADVERTISERS MENTION BETTER FRUIT 



