374 
Proceedings of the Royal Society 
experiments made by the author completely bear out those made 
with a larger tube. He has been unable to verify some of Schkla- 
rewsky’s statements. 
To summarise the conclusions arrived at in this first part of the 
paper they are the following : — 
1. If the specific gravity of several different sized spheres is 
greater or less than the liquid in which they are suspended, 
the larger the sphere, provided it does not exactly fill the 
tube, the quicker it circulates. 
2. If the specific gravity of several different sized spheres is equal 
with, or approaches close to, that of the liquid in which 
they are suspended, the larger the sphere the slower it 
circulates. 
3. Spheres of the same size, all specifically heavier or lighter 
than the suspending liquid, and differing from each other in 
specific gravity, move less rapidly the more they diverge in 
specific gravity from that of the liquid in which they are 
immersed. 
4. The nearer the suspended body approaches to the specific 
gravity of the liquid in which it is suspended, the more it 
tends to occupy the centre of the stream. 
5. If a sphere is of the same specific gravity as the liquid in 
which it is immersed, whatever its size in relation to the 
tube, it will circulate quicker than any other sphere of the 
same size. 
6. The same statements essentially hold good for discs. 
7. Bodies so much heavier or lighter than the suspending liquid 
as to cause them to come in contact with the wall of the 
tube, rotate. Those whose specific gravity is equal with 
that of the suspending liquid, running as they do in the 
axis, glide. This holds good whether the body be a sphere 
or a disc. 
8. A disc and a sphere, each of the same specific gravity as the 
liquid, of equal absolute weight and of equal diameter, 
circulate in the same time, and both have a gliding motion. 
9. In bodies heavier or lighter than the liquid in which they are 
immersed, provided they are so constructed as to be acted 
