at  the  Exeter  Meeting,  1850. 
477 
more  difficult  to  set  up  than  in  Clayton’s,  which  were  only 
134  inches  long.  We  give,  however,  the  results  below  : — 
Name. 
Stand. 
Article. 
Length  of 
Pipe  made. 
Diameter  of 
Pipes. 
Men. 
O 
Time. 
Quality  of 
Pipes. 
Whitehead 
17 
2 
inches. 
106 
inches. 
H 
i 
1 
min. 
5 
Fair. 
Clayton  . 
9 
1 
234 
GO 
2 
1 
Good. 
Scraggs  . . . 
26 
1 
78 
9 
2 
. . 
Do. 
Whitehead’s  small  machine  and  Clayton’s  vertical  one  were 
then  tried  in  making  3-inch  pipes,  and  the  results  were  as  fol- 
low : — 
Name. 
Stand. 
Article. 
Length  of 
Pipes. 
Diameter  of 
Pipes. 
1 Number  of 
| Pipes. 
Men. 
o* 
Time. 
Quality  of 
Pipes. 
Whitehead  . . 
17 
i 
inches. 
13i 
inches. 
3 
170 
i 
1 
min. 
10 
Very  good. 
Clayton  . 
9 
i 
He* 
CO 
195 
2 
1 
Do. 
The  following  trials  were  then  made  on  the  Friction-Brake,  or 
Dynamometer,  with  these  results  : — 
Name. 
Stand. 
Article. 
Length  of  Pipe 
in  inches. 
Diameter  of 
Pipes. 
Revolutions  of 
Brake. 
Friction  of 
machine  when 
full. 
Friction  when 
empty. 
Price. 
Quality  of 
Pipes. 
Whitehead  . . 
17 
2 
888 
inches. 
H 
32 
lbs. 
26 
lbs. 
4 
£. 
28 
Very  good. 
Clayton  . . . 
9 
1 
686 
14 
20 
19 
3* 
29 
Good. 
Scraggs  . 
26 
2 
861 
i| 
37 
23 
4 
15 
Very  good. 
Whitehead 
17 
i 
297 
3 
32£ 
22 
4 
21 
Do. 
Clayton  . 
9 
i 
270 
3* 
.21 
19 
29 
Do. 
Scraggs  . . . 
26 
2 
250 
3? 
36 
18 
4 
15 
Do. 
From  the  above  results  a calculation  was  then  made  to  ascer- 
tain the  powrer  required  in  making  14-inch  pipes  by  the  above 
machines,  and  the  following  Table  will  show  the  comparative 
power  required  to  produce  100  by  each  machine  : — 
VOL.  XI.  2 i 
