. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 178 THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. [June, REGISTER OF NEW PATENTS. PRESERVATION OF ORGANIC SUBSTANCES. John Ryan, of the Royal Polytechnic Institution, doctor of medi- cine, and professor of chemistry, for " Impwvcmenls in the preseri-a- tion of organic arid other sitbsl';—Granted Oct. 17, ]81G ; En- rolled April 17, 18-47. These improvements relate, firstly, to preserving orijanic and other substances, by supplying thereto a mixture of gases and v
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 178 THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. [June, REGISTER OF NEW PATENTS. PRESERVATION OF ORGANIC SUBSTANCES. John Ryan, of the Royal Polytechnic Institution, doctor of medi- cine, and professor of chemistry, for " Impwvcmenls in the preseri-a- tion of organic arid other sitbsl';—Granted Oct. 17, ]81G ; En- rolled April 17, 18-47. These improvements relate, firstly, to preserving orijanic and other substances, by supplying thereto a mixture of gases and vapours which are opposed to comlnistion and decomposition, applied either in com- bination with air or instead of air. The gases preferred are either a mixture of carbonic and chloro-hydric acids, or a mixture of carbonic and acetic, or pyroligneous acids. For preserving animal matters, a mixture of carbonic and pyrolig- neous acids in a gaseous form, is preferred, because of the presence of a small quantity of kreasote; sometimes a little kreasote is added and allowed to pass over with the gases into the vessel containing the substance to be preserved. These gases are obtained from any suitable carbonates, but carbonate of lime in the form of marble is preferreil, to which IS sometimes added common cliloro-hydric acid, diluted with half its bulk of water; by which a mixture of carbonic and chloro- hydric acid gases is procured. If it be necessary to render the mode of preservation more complete, there is added a small quantity of kreasote, in the proportion of half-a-drachm to two quarts of the liquid. In this case, the mixed acids carry off' with them a portion of the kreasote vapour. In other cases, to obtain the carbonic acid of the marble, rough or unpurified pyroligneous acid, containing small quantities of kreasote, is used ; by which a mixure of carbonic pyro- ligneous acid and the vapour of kreasote is obtained. If coarse py- roligneous acid cannot be obtained, eithe
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