THEEMAL EFEECTS OF FLUIDS IN MOTION. 
327 
slow or quick. The wires being tied to it, were prevented from twisting out of their 
proper position. The distance of d from the axis of revolution was generally 44 inches. 
The thermal value of the indications of the galvanometer was repeatedly ascertained by 
direct observations of the effect of heating the junctions. 
The following Tables comprise the results of those experiments in which 
the junction was placed at right angles to the direction of its motion. 
Series III. — Junction of wires y^th of an inch in diameter. 
Velocities in the 
alternate experiments, 
in feet per second. 
Difference of 
thermal effect. 
Estimated effect 
of low Telocity. 
Thermal effect 
of liigh velocity. 
Velocity due 
to 1° C. 
53‘6 and 21 
6-21 
6-037 
6-247 
108 
77‘8 and 17"5 
0-258 
0-025 
0-283 
146-3 
105 and 18 
0-373 
0-026 
0-399 
166-2 
126‘4 and 44-8 
0-320 
0-058 
0-378 
205-6 
146 and 25 
0-673 
0-030 
0-703 
174-1 
159'3 and 34 
0-866 
0-041 
0-907 
167-3 
180 and 48 
0-671 
0-051 
0-722 
211 
186-6 and 48-3 
0-967 
0-071 
1-038 
181-3 
221 and 47 
1-393 
0-050 
1-443 
184 
300-5 and 105-8 
2-364 
0-333 
2-697 
183 
315-6 and 73 
3-572 
0-202 
3-774 
162-5 
326-5 and 66-2 
4-133 
0-172 
4-305 
157-3 
372-5 and 66-4 
5-21 
0-170 
5-380 
160-6 
Series IV. — Junction of wires ^th of an inch in diameter. 
Velocities in the 
alternate experiments, 
in feet per second. 
Difference of 
thermal effect. 
Estimated effect 
of low velocity. 
Thermal effect 
of high velocity. 
Velocity due ! 
to D C. ! 
i 
29 and 17-5 
6-022 
6-012 
6-034 
157-2 
46-2 and 15-5 
0-157 
0-026 
0-183 
108 
73-7 and 16-75 
0-281 
0-024 
0-305 
133-5 
90 and 17 
0-363 
0-013 
0-376 
146-8 
139-1 and 26 
0-6l 
0-021 
0-631 
175-1 
155-6 and 26 
0-878 
0-024 
0-902 
163-9 
246-4 and 31 
1-482 
0-023 
1-505 
200-8 1 
262-6 and 35 
2-087 
0-045 
2-132 
179-8 ! 
Series V. — Junction of wires i^^h in diameter. 
Velocities in the 
alternate experiments, 
1 in feet per second. 
Difference of 
thermal effect. 
Estimated effect 
of low velocity. 
Thermal effect 
of high velocity. 
Velocity due 
to D C. 
64-03 and 3.3-96 
6-127 
6-049 
6-176 
152-6 
91-48 and 41-17 
0-204 
0-073 
0-277 
173-8 
; 134-9 and 51 
0-67 
0-112 
0-782 
152-5 
160-73 and 47-34 
0-685 
0-097 
0-782 
181-8 
177-9 and 48-25 
0-863 
0-100 
0-963 
181-3 
208 and 44 
1-469 
0-071 
1-540 
168 
2x2 
