Analyses (Mm. Gastinel-bey and George Marie of Cairo) of Rocks
Brought Home by the First Khedivial Expedition.
(All by Voie Sèche.)
Gold (assay on 100 grammes)—
1. In basalt (lava?).
2. In serpentine.
(None in white quartz.)
Silver—
1. In Filon Husayn, 1/1000 = 265 to 300 francs per ton (very
good).
2. In red sands, 1/10,000 (= 20 francs per ton).
3. In scoriæ, traces.
(None in white quartz or in the black sands.)
Copper—
1. In Aynúnah quartz, 4 1/2 per 100.
2. In Filon Husayn, 2 1/2 to 3.40 per cent.
Filon Husayn = Titaniferous iron, 86.50
Silica, 10.10
Copper, 3.40.
3. In chloritic slate, 1.40 per cent.
(Chloritic slate of Makná' =
Silica, 90.50
Carbonate of lime, 5.60
Oxide of iron, 2.30
Copper, 1.40.)
Sulphur (Jebel el-Kibri't of El-Muwaylah)—
4 per cent. above. 9 ditto below.
Lead everywhere.