, as it
affords an easy means of determining the specific gravity of liquids,
especially such of which only small quantities can be conveniently
obtained.
With the ordinary araeometers, as hitherto constructed, a considerable
quantity of the test fluid is required, and an elaborate calculation
necessary for each determination. In the new araeo-picnometer these
drawbacks are ingeniously avoided, so that the specific gravity of any
liquid can be quickly and easily obtained with astonishing accuracy.
The new and important feature of this instrument consists in a glass
bulb, c--see accompanying sketch--which is filled with the liquid
whose gravity is to be determined. Thus, instead of floating the
entire apparatus in the test fluid, only a very small quantity of the
latter is required, an advantage which can hardly be overestimated,
considering how difficult it is in many instances to procure the
necessary supply.
[Illustration]
^
=
=
=
= a
=
=
\ = /
| = |
|~~~~~~~~~~~~~~|
| - - = - -|
|- - = - |
| - - = - -|
|- - = - |
| - / \ -|
|- - | b | - |
| \ / -|
|- e//- -\\d |
| - | c | -|
|- \ _ / |
| - \ / -|
|- = - |
| - = -|
|- | | - |
| - \f/ -|
|- - v - |
| -|
/ \
------------------
The glass bulb, c, when filled with the test fluid, is closed by means
of an accurately fitting glass stopper, d, and the instrument is then
placed in a glass cylinder filled with distilled water of 17.
Pages:
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121