General Science . 
region chiefly limestone). Amongst various objects of natural 
history, is what the travellers termed a sand-tree : it was about 
two feet high, and resembled a tree with its branches. It was 
found on the shore of Lake Michigan, and on examination 
proved to be a parasitic fungus, completely encrusted with sand* 
which in that region drives as on the Arabian Desert. It is in 
contemplation to send another expedition for the same purposes, 
and to the same regions, next year. 
36. Prevention of Rust. — The prevention of rust, on such 
articles of furniture as are made of polished steel, is an object of 
great importance in domestic economy. The cutlers in Shef- 
field, when they have given knife or razor blades the requisite 
degree of polish, rub them with powdered quicklime, in order 
to prevent them from tarnishing ; and we have been informed, 
that articles made of polished steel, are dipt in lime-water by 
the manufacturer, before they are sent into the retail market. 
37. Latitude and Longitude of Places in New South Britain . 
—Principal Baird has communicated to us the following valua- 
ble Table: 
Start Point, 
62° 
42' S. 
61° 28' W 
Cape Sherriff, 
62 
26 
60 54 
Desolation Island, 
62 
27 
60 35 
Smith’s Island, 
Cape Melville, 
62 
1 
57 44 
Martin’s Head, 
62 
12 
58 20 
Penguin Island, south end, 
Bridgeman’s Island, 
62 
6 
58 6 
Tower Island, ... 
63 
30 
60 30 
Hope Island, - 
63 
5 
57 4 
Cape Bowles, - 
61 
19 
54 10 
O’Brien’s Island, 
Seal Island, and Reef, 
61 
1 
55 33 
Cape Valentine, 
61 
3 
54 48 
Cornwallis Island, 
61 
0 
54 36 
Lloyd’s Promontory, 1 
Clarence’s Island, north end, ) 
61 
2 
54 10 
Ridley’s Island, north end, 
61 
5 
58 23 
Falcon Island, ... 
62 
18 
59 56 
38. Method of consuming Smoke . — The following method 
of consuming smoke, has been communicated to us by John Ro- 
bison, Esq. F. R. S. E. “ An accidental observation of an ex- 
plosion in a laundry-stove, having suggested to me a probable 
VOL. V. NO. 9- JULY 1821. (A 
