86 ON THE EFFECT OF THE INTERNAL FRICTION OF FLUIDS
Baily's results with spheres suspended by fine wires.
n By theory
No. and kind Diameter of sphere Diameter of wire. For For inertia Additional for inertia
2a 2&i buoy- on on account
ancy common of internal
theory friction
H-INCH SPHERES "No. 1, Platina 1-44 0-01429 1 0-5 0-289
No. 2, Lead 1-46 0-01429 1 0*5 0-285
No. 3, Brass 1-465 0-01429 1 0-5 0-284
No. 4, Ivory 1-46 0-00251 1 0-5 0-285
2-INCH SPHERES
No. 5, Lead 2-06 0-01429 1 0-5 0-202
No. 6, Brass 2-065 0-01429 1 0-5 0-202
No. 7, Ivory 2-06 0-01429 1 0-5 0-202
3-INCH SPHERE
No. 66, Brass 3-030 0-023 1 0'5 0-137
n By theory (continued)
No. Correction Correction for confin- Total n By experiment Difference
for wire ed space
1 0-035 0-011 1-835 1-881 +0-046, or +^y
2 0-035 0-011 1-831 1-871 + 0-040, or + /0-
3 0-035 0-011 1-830 1-834 + 0-004, or +T*f
4 0-016 0-011 1-812 1-872 +0-060, or +$Q
5 0-012 0-032 1-746 1-738 -0-008, or -ofe
6 0-012 0-032 1-746 1-751 + 0-005, or +^7,-
7 0-012 0*032 1-746 1-755 + 0-009, or +rJ-3;
66 0-005 0-101 1-743 1-748 +0-005, or +3^
with cylindrical rods. The result obtained with the brass sphere No. 3 happens to agree almost exactly with theory. However, as the results obtained with this sphere exhibited some anomalies, it seems best to exclude it from consideration. The value of n, then, which belongs to a 1|- inch sphere, appears to exceed by a minute quantity the value deduced from theory. The difference is indeed so small that it might well be attributed to errors of observation, were it not that all the spheres tell the same tale. Thus the error + 0*046 in the case of the platina sphere corresponds to an