206 E. W. Milgard—Flocculation of Particles. 
velocity corresponding to its true hydraulic value, or even a 
one four or five times higher; the cause being that its sing 
left between the aggregate-grains; the relation between the — 
two being somewhat like that between gunpowder dust and — 
coarse blasting powder. i: 
If now the coarse sediment be violently stirred by shaking — 
up, or if it be boiled even lightly, the heavy masses disappear, — 
the water becomes uniformly turbid, and after the proper time — 
of quiescence, a thin horizontal layer of single-grain sediment — 
is formed at the bottom of the vessel. 
There is nothing very remarkable or new in this experiment 
every chemist knows the phenomena it exhibits from every-day — 
me 
v 
alue. 
3. The tendency to flocculation varies inversely as the tem- — 
perature. In water near the boiling point itis very slight; 80 — 
strikingly less, that at one time I seriously contemplated the 
se) EN A See a ERR se IME Ee DS CET EEE RNA parry a en Ae RE weal Ee. Le 
