Thus we find that in the period of four years cane sugar has lost 15,000 tons and it will lose still more when new manufactories shall have been established.  The consumption of Russia is estimated at 85,000 tons, of which 35,000 is beet-root, and what proves that the latter every day gains ground is, that the orders to the Havana are constantly decreasing, and prices are getting lower.  In 1848 Austria consumed 40,000 tons, of which 8,000 were beet-root.  Last year (1851,) she produced 15,000 tons.  The production of the continent rising to 200,000 tons, and the consumption remaining nearly stationary, it is evident that Brazilian and Cuban sugars will encumber the English market, independently of the refined sugar of Java, which Holland sends to Great Britain.  When the continental system was established by the decrees of Milan and Berlin, the Emperor Napoleon asked the savans to point out the means of replacing the productions which he proscribed:  it is to the active and useful impulse which his genius impressed on all minds, that France and Europe owe this fresh manufacture—­a creation the more valuable as its fortunate development required the co-operation of chemical science and agricultural improvement.”

The quantity of sugar extracted from beet-root in the commencement of the process, amounted to only 2 per cent.; but it was afterwards made to yield 5 per cent., and it was then supposed possible to extract 6 per cent.  On this calculation the fiscal regulations for the protection of colonial sugars in France were founded; but recent experiments have been made, by means of which as much as ten and a half per cent. of sugar has been obtained.  The following notice of the improved process is given in a number of the Constitutionnel:—­

“It appears that a great improvement is likely to be made in the manufacture of beet-root sugar.  Those who are acquainted with the process of this manufacture, are aware that M. de Dombasle has the last six years exclusively devoted himself to bring to perfection the process of maceration, of which he is the inventor.  Adopting recent improvements, this process is materially altered, and has now arrived at such a point of perfection that it could scarcely be exceeded.  The Society for the Encouragement of National Industry recently appointed committees to examine the effect produced in the manufactory of Roville.  They witnessed the entire progress of the work, every part of which was subjected to minute investigation.  Similar experiments have been made in the presence of many distinguished manufacturers.  We have not the least intention to prejudge the decision which may be made on this subject by the society we have alluded to; but we believe we are able to mention the principal results that have regularly attended the works of the manufactory this year.  The