Oil of cinnamon and oil of cassia, according to Mulder, have the same composition.  When fresh they are pale yellow, but become brown on exposure to the air.  On exposure they rapidly absorb cinnamic acid, two resins and water.

More than 22,000 lbs. of essence of bergamot was imported in 1848.  It is obtained by distillation or pressure from the rind of the fragrant citron.

Andropogon calamus aromaticus, of Royle, A. nardoides, of Nees v.  Esenb., according to some yields the grass oil of Namur.

The fruits of Carum carui, a hardy biennial British plant, popularly known as caraway seeds, supply a volatile oil, which is carminitive and aromatic.  Oils of a similar kind are obtained from Coriandrum sativum, from anise (Pimpinella Anisum), and cumin (Cuminum Cyminum), a native of Egypt.

The production of cinnamon, clove, and cassia oils, have already been noticed in speaking of those spices.

In Malabar, a greenish sweet-smelling oil is obtained, by distillation, from the roots of Unona Narum, an evergreen climber, which is used medicinally as a Stimulant.

OIL OF PEPPERMINT.—­Mr. De Witt C. Van Slyck, of Alloway, Wayne county, New York, furnished me with the following particulars on the cultivation of peppermint, in December, 1849, which may appropriately be introduced in this place:—­

“As an agricultural production, the culture of peppermint in the United States is limited to few localities; this county and the adjoining ones, Seneca and Ontario, comprise the largest bed.  In the year 1846 about 40,000 lbs. of oil were produced.  In Lewis county, in this state, it is grown, though to a less extent; the amount of oil produced there in 1846 was estimated at 4,500 lbs.  In Michigan about 10,000 lbs. are annually produced; Ohio furnishes about 3,000 lbs. and Indiana 700 lbs. per annum.  The entire crop in the United States, in the year 1846, is estimated in round numbers at 58,000 lbs.

The above comprises all the localities of any importance in the United States, and the above estimates of the annual product of oil were made from correct data for the year 1846, since which time the cultivation of mint has rapidly decreased in consequence of a speculative movement by a New York company, who in the spring of 1847 purchased nearly all the mint then growing in this State, and stipulated with the growers not to raise it for two years thereafter, which condition was generally observed on the part of the growers.  The present year (1849), on account of the drought, has not realised the expectations of those engaged in its culture, although the amount of oil produced is much larger than the product of the two preceding years.  In this mint district, 8,000 lbs. have been raised; Lewis county furnishes 1,000 lbs.; Michigan, 8.000 lbs.; Ohio, 1,000 lbs., and Indiana 500 lbs.  So that the entire crop of 1849