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tion; and a strong argument with him in favor of the process is the well-known fact that such matter will gradually penetrate the wood by those forces which tend to give a uniform distribution of fluid within the pores of any porous matter, and which will be influential, though the pores be not full of fluid, the wood being in what is usually called a damp state.

There is one other consideration which was of importance to Faraday in forming a judgment on this process; it is, that, where the exterior is preserved from change, the chances that the interior will decay are greatly diminished. For instance, piles or timbers charred on the outside preserve the interior parts from decay for a much longer period, so he thinks it safe to conclude that even an external preparation of timber would greatly diminish the probability of internal decay; and this, in combination with the gradual penetration of the substance to the centre, is the reason why he entertained little doubt of the value of the process of kyanizing.

But kyanizing has gone out of use in England. It was abandoned many years ago. Mr. James B. FRANCIS, after a most careful investigation of the matter in 1849, attributes the cause to be entirely independent of the success of the process itself, when properly applied.

Among the causes that led to the abandonment of the kyanizing process in England may be mentioned :

1. The mismanagement of the celebrated Anti Dry Rot Company, which was a disgrace, and which created a universal prejudice against the whole subject of the preservation of timber by kyanizing. *

2. The Rothschilds had a monopoly of the product of the Spanish quicksilver mines, and practically controlled the market, as they do to-day; which had, and now has, the effect of materially increasing the cost of corrosive sublimate.

* The Anti Dry Rot Company, London, purchased the patent for England of N Kyan. Preparations were made for an extensive introduction of the patent through country; but, after a brief period of considerable notoriety, the manager ran off upwards of £70,000, which ruined the company.

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Posts planted to equal depths in the yard of Proprietors of Locks and Canals, Lowell, Mass. Those in front row
were kyanized in 1862 and those in back row were left in the natural state. The boxing about the kyanized specimens
protect them where pieces for exhibition have been taken out. All specimens in the back row are boxed to prevent them
from falling to pieces.

Photographed in 1891.

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Specimens of Old Growth White Pine, from a post 9" x 9", 18 feet long, cut in two. One half was kyanized in 1862 and the other half left in the natural state. Both parts were planted to an equal depth in the ground April 29, 1863.

Dug up and photographed in 1891.

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