150 
DE. J. P. JOULE 01^ THE SLTIEACE-COILDEHSATION OE STEAM. 
Series 1. — Thickness of water space 0‘06 inch. 
Direction of water. 
No. 
Quantity of refrigerating 
water. 
Conductivity. 
Contrary to the 
24 
612-82^ 
335-65" 
steam. 
27 
739-8 
342-5 
28 
767-16 
353-6 
30 
606-33 
S 689-55 
332-85 
!>332-89 
31 
797-34 
408-89 
32 
691-69 
256-3 
33 
611-69 J 
300-41 J 
Tlie same as that 
34 
657-251 
522-1 
of the steam. 
35 
1244 
466-96 
36 
1292-2 
:>-1158-3 
474-32 
;>486-94 
37 
1302-1 
491-56 
38 
1296 J 
479-77 J 
Series 2. — Thickness of water space 0‘025 inch. 
1 
1 Direction of water. 
No. 
Quantity of refrigerating 
water. 
Conductivity. 
Contrary to the 
steam. 
41 
42 
53 
54 
55 
56 
133-45'] 
155-04 } 
103-32 ! 
117-42 
129-21 
177-79 J 
303-45'' 
303-08 
305-89 
354-74 
411-66 
623-85_^ 
>367-11 
The same as that 
65 
150-75"! 
228-48"] 
of the steam. 
66 
00 
00 
00 
00 
412-24 
>350-42 
67 
212-75 J 
410-55 
Thus with the refrigerating water flowing in a direction opposite to that of the steam, 
we have the conductivities 332-89 and 367-11 ; whilst with the water flowing in the 
same direction as the steam, we have the conductivities (referred to the same quantities 
of refrigerating water) 417-3 and 320-96. The means for the two directions are 350 
and 369-13, whence we may conclude that the conductivity is little influenced by the 
direction in which the water flows. 
We will now consider the influence of the kind of metal of Avhich the steam-tubes 
were made. In the Table will be found results obtained with tubes of copper, iron, and 
lead. 
