S 2 



MANAGEMENT OF DAIRY PLANTS 



TABLE I 

 TRANSMISSION OF HEAT THROUGH VARIOUS INSULATING STRUCTURES 



Structures 



5/8-in. oak paper, i in. lampblack, 7/8-in. pine. (This is 



the ordinary small stock family refrigerator.) 5.7 



One 7/8-in. board, i-in. pitch, i 7/8-in. board 4.90 



Four 7/8-in. spruce boards, two papers, solid, no air space . 4. 28 

 Two double boards and paper (four 7/8-in. boards), and one 



air space 3.71 



One 7/8-in. board, 2-in. pitch, one 7/8-in. board 4. 25 



One 7/8-in. board, 2^2-in. mineral wool, paper, one 7/8-in. 



board 3.62 



Two 7/8-in. double boards and two papers, i-in. hair felt. . 3.318 

 Two 7/8-in. boards and paper, i-in. sheet cork, two 7/8-in. 



boards and paper 3 . 30 



One 7/8-in. board, paper, 2-in. calcined pumice, paper and 



7/8-in. board 3 . 38 



Four double 7/8-in. boards with paper between (eight 



boards) and three 8-in. air spaces 2.7 



Hair-quilt insulator, four boards, four quilts, hair 2.51 



One 7-in. board, 6-in. pat. silicated strawboard, air cell 



finished inside with thin layer pat. cement 2 . 48 



One 7/8-in. board, paper, 3-in. sheet cork, paper, one 7/8-in. 



board 2.10 



Two 7/8-in. boards and paper, 8-in. mill shavings and paper, 



two 7/8-in. boards and paper i . 35 



Same slightly moist i . 80 



Same damp 2.10 



Double boards and paper, i-in. air, 4-in. sheet cork, paper, 



one 7/8-in. board i . 20 



Same, with 5-in. sheet cork 90 



7/8-in. board, paper, i-in. mineral wool, paper, 7/8-in. board 4 . 6 

 Double boards and papers, 4-in. granulated cork, double 



boards and paper 1.7 



C. Insulating Walls. Pine wood is a good insulator. When 

 used for walls, the value for n has been given as 2 B. T, U. 



