SCIENTIFIC SUMMARY. 
399 
<£ I found that the quartz of the porphyry of Dun Dhu, in Arran, was 
full of cavities contained in the doubly acuminated crystals of quartz, for 
which this remarkable porphyry is distinguished. I also discovered, in 
the doubly acuminated crystals of quartz formed in the saliferous 
gypsums of India, thousands of fluid cavities, and the quartz impressed 
with the gypsum ; and as no geologist would hold that this formation was 
of igneous origin, and as the quartz was impressed by the gypsum, if not 
contemporaneous, must have been subsequent to it ; and, as the same 
phenomena were exhibited in the porphyry of Dun Dhu, I am forced to 
the conclusion that the latter was as much aqueous in its origin as the 
saliferous gypsum from India.” 
The Gold Deposits of Nova Scotia. — In the month of March, in 18G1, a 
man stooping to drink at a brook observed a small piece of gold among 
the pebbles at the bottom, and, having picked it up, searched and found 
other specimens. This occurred at a place about a mile eastward of 
Tangier river. Gold was subsequently observed in the quartz lodes on the 
western boundary of Lunenburg harbour ; and Mr. Campbell, who com- 
menced washing the sands accumulated on the sea-shore, was eminently 
successful in finding gold. This led to mining and washing operations on a 
considerable scale. The result of this has been the discovery of several 
extensive tracts of metamorphic rocks, in which veins of auriferous 
quartz abound, and of sands in which gold exists in remunerative quan- 
tities. The following are analyses of those two varieties of Nova Scotian 
gold : — 
Tangier Gold. Lunenburg Gold. 
Gold 98-13 92-04 
Silver 1-76 778 
Copper 0-05 0T1 
Iron trace trace 
99-94 99-91 
Meteoric Stone. — In 1857, a meteoric stone was seen to fall near the 
village of Parnallee, in Southern Hindostan. This stone has been obtained 
and sent to the Western Reserve College, Ohio. It has been carefully 
examined by Professor Cassels, who thus describes it: — 
“ Internally it is a mottled grey colour, having numerous circular spots 
of pure white. Throughout its recent surface are numerous brilliant 
specks of nickel, and distinct crystals of nickeliferous iron, with a good 
deal of iron rust. The meteorite is remarkable for the great amount of 
nickel it contains, nearly 17 per cent. The magnet abstracts 21-151 per 
cent, of magnetic iron and nickel from the powdered stone. A careful 
examination of the stone detected silica, lime, potash, soda, oxide of iron, 
sulphide of iron, oxide of chromium, oxide of manganese, iron, nickel, 
cobalt, copper, sulphur, and phosphorus.” 
The Bessemer process of converting crude iron into steel of fine quality 
at one operation is now acknowledged by its opponents to be a success. 
From specimens recently exhibited by Mr. Brockbank, it is one of the 
most plastic and manageable of metals, more so even than copper. It 
shows a remarkable degree of ductility, and can be bent, flanged, or- 
twisted, either hot or cold, without annealing, and over a considerable 
