199 "
Subtract (1) from (3) to get the weight of wolfram taken:
40.821 grams
12.681 "
------
28.140 "
add the weight of the wolfram to the weight of the bottle filled with
water:
28.140 grams
37.708 "
------
65.848 "
subtract (4) from this to get the weight of water displaced:
65.848 grams
61.199 "
------
4.649 "
Divide the weight of the wolfram by the weight of the water displaced to
get sp. g.:
4.649)28.140(6.053
27.894
------
......
_If the solid is soluble in water, or has a tendency to float_, some
liquid other than water is used. Paraffin oil or oil of turpentine will
do. The process is as follows:--The weight of the dry and empty bottle
having been determined, add a sufficiency of the substance and weigh
again to find how much has been added. Fill up with paraffin oil and
weigh again. Clean out the substance by rinsing with paraffin; fill up
and weigh. Calculate the sp. g. as if water had been used, and multiply
by the sp. g. of the paraffin.
For example:
1. Weight of bottle 39.299 grams
2. " " bottle and nitre 57.830 "
3. " " bottle and paraffin 73.146 "
4. " " bottle and paraffin and nitre 84.665 "
5. " " bottle and water 81.
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