Botany. — General Science. 377 



ritima. Von Buch and the late Christian Smith named it, in their cata- 

 logue of the Vegetation of TenerifF, Pinus canariensis, and they state, 

 that it inhabits that island from the edge of the sea to an elevation of 6700 

 Parisian feet above the level of the sea ; but that the region where it is 

 most abundant may be reckoned at from 4080 to 5900 feet, where snow 

 falls for about a month. The temperature of this zone M. De Candolle 

 estimates to be similar to that of Scotland, or to the north of France, or of 

 Germany. The wood is resinous, highly flammeable, and is excellent for 

 constructing buildings, being known to continue sound for ages. 3. Ne- 

 mopanthes canadensis, (the Ilex canadensis of Michaux.) 4. Jussiwa 

 longifolia, DC. 5. Sesamum indicum, Linn. 6. Silene picta, Desf. 



There are thus six plates, and twenty-one pages of letter-press. The size 

 is a large quarto, and the execution of the plates is such as to reflect great 

 credit both upon those who have made the drawings and those who have 

 engraved them. 



IV. GENERAL SCIENCE. 



20- Lieut. Kotzebue's recent Voyage of Discovery. — Dispatches have been 

 received from this active navigator, from the harbour of St Peter and St 

 Paul in Kamschatka, where he had arrived on his return home. He has 

 discovered three Islands, one of which, called after his ship Predprirctige 

 Island, is situated in west Long. 140° 2' 38" and south Lat. 15° 58' 18". 

 The second, called Bellinghausen, after the eminent Russian navigator, 

 is situated in west Long. 154° 30' and in south Lat. 15° 48' 7". The 

 third called Kordaken, after his first Lieutenant, is in west Long. 168° 6' 

 and in south Lat. 14° 32' 39", This Island, however, had been previous- 

 ly discovered by M. Freycinet. 



Lieut. Kotzebue has examined Navigation Island, and has corrected 

 the positions of several places in the Pacific Ocean. He visited Otaheite 

 and Owyhee, and he saw the Island of Karishof, seen by Roggewcns in 

 1722, and situated in west Long. 145° 24' 22" and south Lat. 14° 27'. 



21 • Steam-Boat Enterprise/or India. — This Steam-Boat, which sailed on 

 the 2d August, is the first which has ventured to cross the Indian seas, and is 

 one of 500 tons burden. It has two steam-engines, each of 60 horse power. 

 The boilers, which are made of copper, extend across the ship, and are heat- 

 ed by seven furnaces, each seven feet in depth. The whole of the machinery 

 is executed by that able engineer Mr H. Maudslay, who has contrived an 

 ingenious method of changing the water in the boilers, in order to prevent 

 the deposition of a crust of a salt on the bottom of the boilers. He has also 

 fixed up an ingenious pump to answer various purposes on board a ship, and 

 he has constructed a moveable railway to conduct the coals to the furnace 

 when they are wanted. The coals which the Enterprise carries along with 

 her, amounting to about 300 tons, are partly contained in chambers within 

 the sides of the vessel, covered with sheet iron, and partly in tanks beneath, 

 which, as the coals are used, will be filled with water, to keep the vessel 

 properly ballasted. There are twenty cabins in the ship, furnished ele- 

 gantly, and supplied with every convenience. 



