The Science record; a compendium of scientific progress and discovery . our sum-mary, in brief, of the interesting facts pertaining toscience, that have come under our notice during theyear just closed. The gratifying success which has attended ourprevious issues, and the large demand for copies ofthe present work, in advance of its actual publica-tion, will encourage the efforts of the publishers inbeautifying and improving the contents of futurevolumes. For the information of those who may wish topossess the complete series of volumes, we wouldstate that Science Record was commenced as anann
The Science record; a compendium of scientific progress and discovery . our sum-mary, in brief, of the interesting facts pertaining toscience, that have come under our notice during theyear just closed. The gratifying success which has attended ourprevious issues, and the large demand for copies ofthe present work, in advance of its actual publica-tion, will encourage the efforts of the publishers inbeautifying and improving the contents of futurevolumes. For the information of those who may wish topossess the complete series of volumes, we wouldstate that Science Record was commenced as anannual work, in 1872. The present is therefore thethird book of the series. The publishers have re-printed the Science Record for 1872 and 1873, andwill hereafter be able to fill orders for any of thevolumes. The Index of References given at the end of thevolume indicates the sources whence most of the in-formation here presented is derived. The numbersat the foot of the variqus articles refer to the worksnamed and enumerated in the above index. New-York, January, BARON JUSTUS VON LIEBIG. SCIENCE RECORD CHEMISTRY AND METALLURGY. THE ARTIFICIAL FORMATION OF ORGANICSUBSTANCES. By Dr. Henry E. Armstrong, , Professor ofChemistry, London Institution.—From marsh-gas or me-thane, by a series of operations similar to those wherebyethane is converted into ethylic alcohol, an alcohol is ob-tained which proves to be identical with methylic alcohol,or wood-spirit, one of the main products of the destructivedistillation of wood. These alcohols serve as the starting-points for the preparation of other hydrocarbons andalcohols, bearing relations to each other similar to thosewhich obtain between methane and ethane, and betweenmethylic and ethylic alcohols. Many of the alcohols, asprepared artificially, are identical with the alcohols whichare obtained, together with ordinary alcohol, by ferment-ing saccharine substances, or which exist in the form ofcompound ethers in the ethereal
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