146 
DK. J. P. JOriE ON THE SHEFACE-CONDENSATION OE STEAM. 
On a cursory examination of the Table, it will become evident that the numbers in 
column 18, representing the conducting power, increase as the space between the tubes, 
which serves to convey the refrigerating water, is contracted. It will also be noted that 
an increase of conduction likewise takes place when the quantity of water transmitted 
between the same tubes is augmented. I will begin by arranging the results so as to 
show the effect of altering the velocity of the refrigerating water. 
Series 1. — Copper steam-tube. Water space between tubes 0'325 inch. 
No. of experiment. 
Quantity of refrigerating 
■water. 
ConductiTity. 
1 
2 
i ^ 
7 
97-6^ 
V345'5 
591 f 
594-4 J 
98-0 
152^2 
149-4 J 
8 
597 I 
138-8'] 
i 6 
631-8 1 
184-3 1 
9 
658 >688-8 
151-6 >172-5 
3 
758-9 
195-7 1 
4 
798-2 J 
191-9 J 
Series 2. — Copper steam-tube. Water space between tubes 0'06 inch. 
No. of experiment. 
Quantity of refrigerating 
water. 
Conductivity. 
29 
16-37^ 
80-9 n 
25 
18-07 
29-26 
18 
20-41 
89-62 
19 
43-57 
143-9 
20 
6l-l6 
^ 99-24 
155-9 
>152-67 
21 
76-5 
279-8 
22 
124-5 
198-5 
17 
189-47 
193-8 
23 
343-1 J 
202-3 J 
26 
592-3^ 
297-4 
30 
606-3 
332-8 
33 
611-7 
300-4 
24 
32 
612-8 
691-7 
>689-04 
335-6 
256-3 
>334-31 
27 
739-8 
342-5 
28 
767-2 
353-6 
31 
797-3 
408-9 
