1895.] Fluorine as a Test for the Fossilization of Animal Bones. 445 
Ash 
| 2813 3 
ea 3 
Triassic. oe be hys 
2 e] Gd 
a S ara TS mA 
A OLA 
z E 
— 
wow r from muschelkalk of Bay- 
IOR, ~ Bér piens -yellow, becoming greenish- 
Jook by ignition. Carbonate of lime in considerable 
quantity ; chlorine normal, no silica...... EE +| 11.92 | 2.41 | 19.64 | 1.40| 1.75) 0.80 
2. Reptile from muschelkalk of Moselle e brown, 
g gra after ignition. Gain of carbonate 
Hime, very ittle magnesia and chlorine, and alittle fer- 
ous clay 16.28 1.75 | 24.23 2.07 2.16 0.96 
Average of the two Triassic specimens: 
Phosphoric acid, i ace es 21.93 3 
Fluorine, pk iss 1.74 , 
~ F Ratio, 0.89. 
Fluorine paleuiated for enue, : : 95 
Ash 
; i 3 
~ Li} end 
g g 3 = 
‘71 BS i ge te 
Permo-Carboniferous. INTE gioa 
2/18 /}421sia 
Bot Md E 
S £ E 
— 
1. Pleuracanthus frossardi. Cartilaginous fish from 
Thelots near Autun (Department of pane LON): 
poe black imprint on schist. The detached fi 
nt gives mes dark chestnut powder, beco: - 
oe by ignit Phosphate of iron, a little carbonate 
Sf lime, a iilo ‘chieure soluble in water, abundant res- 
idue inso Sedani pot = E E TTE E wvevevscees 34.55 | 8.18 | 22.57 | 2.26 | 2.01} 1.17 
Pal oide fish from Muse near 
Autun. Brilliant scales vaar a gated age ai becoming 
by ignition uch iron, considerable 
quantity of of et chlorine, no pi marn! of lime, insoluble 
Oe Vet aei a .27 | 6.70 | 26.20 | 1.55! 2.33! 0.67 
Aet vendo Srossardt. A reptile iabyrinthodonte © 
trom Felots near Autun. The same characteris 
29.66 | 2.08 | 28.35 | 3.62) 2.53| 1.43 
4. “opie baylei. Of the same origin and same 
— EI SEE LRI E EATEN PETER TR TCL esevess| 42.52 | 2.37 | 28.23 | 3.15] 2.52] 1.25 
5. pai re From Lebach nea: r Saarbruc = = 
black imprint, “tentier, Aita ut E menia becow 
brownish-red byi ition errape of carbonate Pry ie 
andofchlorure notablequant ity ofeulphateof limeanda 
little pyrites of iron. Insoluble residue quite abundant... 7 o 6.73 | 28.37 | 2.02) 2.53) 0.80 
ikvcaige of the five Permian specimens: 
Phosphoric acid, : ‘ i 26.74 
Poe tis, ee 
Fluorine calculated for apatite . . 2.38 \ Ratio, 1.06. 
