periment 3. Bubbles of carbon dioxid
are given off, indicating the presence of a carbonate. Dilute the
solution; add an excess of ammonia, and we find a white precipitate of
the phosphate of lime and of magnesia.

Experiment 13. Filter the solution in the preceding experiment, and
to the filtrate add oxalate of ammonia. The result is a white
precipitate of the oxalate of lime, showing there is lime present, but
not as a phosphate.

Experiment 14. To the solution of mineral matters obtained from
Experiment 3, add acetate of soda until free acetic acid is present,
recognized by the smell (like dilute vinegar); then add oxalate of
ammonia. The result will be a copious white precipitate of lime salts.

Experiment 15. _To show how the cancellous structure of bone is
able to support a great deal of weight_. Have the market-man saw out a
cubic inch from the cancellous tissue of a fresh beef bone and place it
on a table with its principal layers upright. Balance a heavy book upon
it, and then gradually place upon it various articles and note how many
pounds it will support before giving way.

Experiment 16. Repeat the last experiment, using a cube of the
decalcified bone obtained from Experiment 4.

[NOTE. As the succeeding chapters are studied, additional experiments
on bones and their relation to other parts of the body, will readily
suggest themselves to the ingenious instructor or the thoughtful
student. Such experiments may be utilized for review or other
exercises.]

Review Analysis: The Skeleton (206 bones).

/ / 1 Frontal,
/ / 2 Parietal,
/ I. Cranium | 2 Temporal,
/ (8 bones) | 1 Occipital,
/ \ 1 Sphenoid,
| \ 1 Ethmoid.
|
| / 2 Superior Maxillary,
The Head | / 2 Malar,
(28 bones). | / 2 Nasal,
| II. Face | 2 Lachrymal Bones,
| (14 bones) | 2 Palate Bones,
| \ 2 Turbinated,
| \ 1 Vomer,
\ \ 1 Lower Maxillary.
\
\ / Hammer,