300 ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



It is insulated by two inches of solid cork. Mr. Beckman's klea 

 of making a two unit tank was that the freight rate would be 

 much less, owing to the fact that one tank could be placed inside 

 the other when shipping, as there is a much lower rate charged 

 for basketed tanks, or where one is placed inside the other, than 

 when otherwise shipped. Mr. Beckman has a little attachment 

 that is not shown in the picture, which can be used if desired for 

 stirring the cream while it is cooling. This is operated by a fau- 

 cet on the other side of the tank to let some water flow into a 

 double bucket arrangement where one fills up while the other is 

 emptying; this attached to a stirrer works slowly up and down 

 in the cream. I am not just sure if this attachment would be 

 practical or not, but the tank itself is an excellent one. 



Tank No. 2 was designed by Mr. Valerius of the Creamery 

 Package Company and the writer. It is made of 24 gauge jgal- 

 vanized iron inside and out. The insulating is composed first of 

 J^-inch pine, then covered with hea\'y paper. Next to this comes 

 an inch of solid cork which is covered with paper, then a half- 

 inch of linefelt, then paper again. 



It will be noticed that this tank has two small openings in^ 

 the cover. These were put in for the purpose of emptying the 

 small can of cream into the large can without opening up the 

 whole cover which might cause a slight change of tei;nperature. 

 These small covers for the openings are fitted up with insulating 

 the same as the large covers are. 



Tank No. 3 was designed by Prof. J. H. Frandsen of the 

 Nebraska University, and Prof. F. W. Bouska of Chicago. This 

 tank is constructed of two-inch cypress wood, having smooth 

 surfaces. It is estimated that two-inch cypress has about the 

 same insulating capacity as an inch of solid cork. Cypress has 

 the best lasting qualities outside of California red wood and red 

 cedar, of any known wood. Two-inch wood is used every place 

 excepting the cover, W'hich is constructed of two layers of one- 

 inch cypress wood having a layer of rubberoid paper between. 

 One layer of the cypress is laid crossways and the other length- 

 ways so as to prevent warping of the cover. The outside of the 

 tank has two coats of paint and the inner is oiled. This Is an 



