VOL. LXXXVI.] PHILOSOPHICAL TRANSACTIONS. 4Q 



appear, by the experiments on the white deposit afforded on dissolution in nitric 

 acid, § 5 : and which also was made appear by the synthetic experiments, § 6. 



3. The 3d conclusion is, that these metallic instruments consist of metal only, 

 or at least of nothing else which can be detected by ordinary known modes of ana- 

 lysis : for they are all malleable, and uniform in their texture ; which properties 

 metals do not possess when they are mixed by fusion with extraneous substances 

 hitherto discovered by analysis ; except carbon in several metals, and siderite in 

 iron only. 



4. The 4th conclusion is, that these ancient instruments contain none of the 

 metals but copper and tin : for, 1 . They do not contain gold, silver, or platina, ex- 

 cepting silver in the spear-head, as appears from the experiment of cupellation, § A, 

 (e). — 2. They do not contain lead : for that would have oozed out in the experi- 

 ments of fusion and oxydation ; and would have appeared in the grain of the frac- 

 tures ; as well as on adding muriate of soda, and muriatic acid, to the concentrated 

 nitrate solution, fy 5, (d). — 3. They do not contain iron : for that would have been 

 shown by the prussiateof soda, § 5, (d) ; as was proved by the synthetical experi- 

 ment, §6, exper. 17, (b). — 4. They do not contain zinc: for that would have 

 been shown by the blue flame and white flowers in exper. § 4, (c) (d) ; as well as 

 by the yellow colour of the grain of the fracture, which was shown by the synthe- 

 tical experiments, §6, exper. 13 and 14. 



5. Bismuth would have appeared on diluting the nitrate solution, § 5, (d). — 

 6. Manganese would have been seen on concentrating by evaporation the nitrate 

 solution, § 5, (c) (d). — 7. Arsenic would have manifested itself by the brittleness 

 and whiteness of the metals ; by the smell and visible vapour on exposure to fire 

 and air ; and on examining the solution, § 5, (d), and the white deposit, § 5, (e). 

 — 8. Antimony would have produced more brittleness than these ancient metals 

 possessed : a white vapour would have appeared on examining the white sediment 

 with the blow-pipe, § 5, (e) : as well as in the experiments in the assay-furnace, 

 § 4, (b) (e) ; and a white precipitate would have fallen on diluting the muriatic 

 solution of the white deposit from the nitrate solution, § 5, (e). — 9. Cobalt would 

 have been detected by the prussiate of soda ; and by the colour of the oxyde, in the 

 experiment in the assay furnace, § 4, (b) ; and it would have given brittleness to 

 the ancient metal instruments. — 10. It is not at all probable that nickel was pre- 

 sent ; but if it had been an ingredient, it most likely would have been betrayed by 

 its greenish oxyde in the experiment, §4, (b). — 11. Molybdaena, and quicksilver 

 may be mentioned for the sake of order, but it is utterly unreasonable to suppose 

 them to be present, either naturally or by art ; and evident appearances, or at least 

 traces of them, must have occurred in the preceding experiments. As for the sub- 

 stances called tungsten, uranite, menackanite, and titanite *, we have not yet had 

 sufficient evidence to prove their being peculiar metals ; but from the properties 

 which have been observed to belong to them, it is quite inconsistent with the pre- 



* A new metal, named Titanium, lately announced in the German Journals, — Orig. 

 VOL. XVIII. H 



