182 EECORD OF SCIENTIFIC PROGRESS. 



tinned through eight annual vokimes; but was discontinued with the 

 vohune for 1878. The present undertaking may, therefore, be considered 

 as in some sense a continuation of the work published by the Messrs. 

 Ho r per. 



It is scarcely necessary to remark that in aresum6 of the annual pro- 

 gress of scientific discovery so condensed as the present, the wants of the 

 specialist in any branch can be but imperfectly supplied; and very many 

 items and details of great value to him must be entirely omitted. While 

 the student in a special field of knowledge may occasionally receive hints 

 that will be found of interest, he will naturally be led to consult for 

 fuller information the original journals and special periodicals from 

 which these brief notices or abstracts have been compiled. 



The contemplated plan of devoting some 250 pages of the annual re- 

 port to such a compilation is not designed to jireclude the introduction 

 into the /'General Appendix," as heretofore, of special monographs or 

 discussions that may prove interesting to the scientific student. 



Spencer F. Baird. 



Dr. Samuel Kueelaiid, who conducted it for the years 1867, 1868, and 1869. It then 

 passed under the editorship of Prof. John Trowbridge, for the years 1870 and 1871, 

 when it was finally discontinued, and the "Annual Record of Science and Industry" 

 took its place. 



