When scratched, it yields a black streak.
Crop yields are highly volatile and unpredictably so.
The acid, when distilled slowly, is decomposed and yields a and 0-angelica lactones.
The sea produces three different seals, which often ascend rivers from the coast, and can live in lagoons of fresh water; many cetaceans, besides the " right whale " and sperm whale; and the dugong, found on the northern shores, which yields a valuable medicinal oil.
The " leathery turtle," which is herbivorous, and yields abundance of oil, has been caught at sea off the Illawarra coast so large as 9 ft.
The richest quality yields about 100 to 130 gallons of crude oil per ton, or 17,000 to 18,000 cub.
On oxidation with chromic or nitric acids, or potassium permanganate, it yields nicotinic acid or (3-pyridine carboxylic acid, C 5 H 4 N CO 2 H; alkaline potassium ferricyanide gives nicotyrine, C10H10N2, and hydrogen peroxide oxynicotine, C10H14N20.
Oxidation of its isomethylhydroxide with potassium permanganate yields trigonelline, C 7 H 7 NO 2 (A.
With bromine in acetic acid solution at ordinary temperature, nicotine yields a perbromide, C10H10Br2N20 HBr 3, which with sulphur dioxide, followed by potash, gives dibromcotinine, C10H10Br2N20, from which cotinine, C10H12N20, is obtained by distillation over zinc dust.
By passing the vapour of this compound through a red-hot tube, it yields the isomeric a0- pyridylpyrrol, the potassium salt of which with methyl iodide gives a substance methylated both in the pyridine and pyrrol nuclei.
Suber, the bark of which yields cork (q.v.), is a native of the west Mediterranean area.
It yields colourless salts; the crystallized sulphate has the formula Tb2(S04)3.8H20.
Yields a continuous indication and record of the actual slack paid out.
Beetroot (Beta vulgaris) is used as fodder, and yields about 10 tons per acre.
This yields a characteristic type of pantheism, in the theory of the Unknowable which - rather paradoxically - is offered us.
This pressed amber yields brilliant interference colours in polarized light.
In the former case the nature of the organism is such that it yields readily, when subjected to certain conditions, and all or nearly all the individuals become modified in the same way.
Amongst arboreous families Leguminosae and Euphorbiaceae are prominent; Hevea belonging to the latter is widely distributed in various species in the Amazon basin, and yields Para and other kinds of rubber.
When heated with aniline it yields phenol and acetanilide.
The ante-Nicene age yields priceless records of the early struggles of Christianity; from it we have received specimens of the early apologetic and the early polemic of the Church, the first essays of Christian philosophy, Christian correspondence, Christian biblical interpretation: we owe to it.
Burns for about two months, and yields about 200 tons of sulphur.
It may be condensed and yields a solid which melts at - 55° C. Sulphuretted hydrogen decomposes it with formation of hydrofluoric acid and liberation of sulphur.
The solution obtained may be evaporated in vacuo until it attains a density of 1.46 when, if partially saturated with potassium hydroxide and filtered, it yields crystals of potassium pentathionate, K 2 S 5 0 6.3H 2 0.
The soil, mainly alluvial, is naturally very fertile, and wherever cultivated yields abundant crops, durra being the principal grain grown.
- One pound of good Welsh coal properly burned in the fire-box of a locomotive yields about 15,000 British thermal units of heat at a temperature high enough to enable from 50 to 80% to flow across the boiler-heating surface to the water, the rest escaping up the chimney with the furnace gases.
When heated with hydriodic acid and phosphorus to 200° C. it yields a hexahydride.
Traces remain of the circuit wall, and of a sanctuary with copious terra-cotta offerings; the large necropolis yields constant loot to illicit excavation.
Only one external source can be named: the falling of meteors into the sun must yield some heat just as a shooting star yields some heat to our atmosphere, but the question is whether the quantity of heat obtainable from the shooting stars is at all adequate for the purpose.
Cotton is grown in every county of the state, but the large yields are in the Delta (Bolivar, Coaohma, Washington, Yazoo and Leflore counties), the greatest cotton-producing region of the world, and in Monroe, Lowndes and Noxubee counties on the Alabama border.
The best wine grows in Kakhetia, a district lying north-east and east of Tiflis; this district alone yields nearly 8 million gallons annually.
But all these are insignificant in comparison with the mineral oil industry of Baku, which in normal times yields annually between ten and eleven million tons of crude oil (naphtha).
Its great value to the English forester is as a "nurse" for other trees, for which its dense leafage and tapering form render it admirably fitted, as it protects, without overshading, the young saplings, and yields saleable stakes and small poles when cut out.
The process is repeated every alternate year, until the tree no longer yields the resin in abundance, which under favourable circumstances it will do for twenty years or more.
Acreage and Yields of British Crops.
Turning to the average yields per acre, as ascertained by dividing the number of acres into the total produce, the results of a decade are collected in Table IX.
The effects of a prolonged [[Table Ix]].-Estimated Annual Average Yield per Acre of Crops in spring and summer drought, like that of 1893, are exemplified in the circumstance that four corn crops and the two hay crops all registered very low average yields that year, viz.
The mean values at the foot of the table-they are not, strictly speaking, exact averages-indicate the average yields per acre in the United Kingdom to be about 31 bushels of wheat, 33 bushels of barley, 40 bushels of oats, 28 bushels of beans, 26 bushels of peas, 44 tons of potatoes, 134 tons of turnips and swedes, 184 tons of mangels, 32 cwt.
Although enormous single crops of mangels [[Table X]].--Decennial Average Yields in Great Britain of Wheat, Barley and Oats-Bushels per acre.
The general average yields of the corn crops are not fairly comparable one with the other, because they are given by measure and not by weight, whereas the weight per bushel varies considerably.
For purposes of comparison it would be much better if the yields of corn crops were estimated in cwt.
This, indeed, is the practice in Ireland, and in order to incorporate the Irish figures with those for Great Britain so as to obtain average values for the United Kingdom, the Irish yields are calculated into bushels at the rate of 60 lb to the bushel of wheat, of beans and of peas, 50 lb to the bushel of barley and 39 lb to the bushel of oats.
The yields in the experimental wheat-field at Rothamsted - where there is no change either of land or of treatment - indicate this.