100 REPORT OF THE SECRETARY. 



tributiou, according to the long-establislied policy of tlie Institution, and an edition 

 of 1,000 copies being issued as a numbered volume of tiie " Collections," for deposit 

 witli tbe principal libraries and scieutifio societies of the world. 



658. " Index to tbe Literature of tlie Spectroscope," by Alfred Tuckerman. This 

 bibliograpby is designed to give a list of all tbe books and smaller treatises, espe- 

 cially contributions to scieutiiic periodicals, on tbe spectroscope and spectrum an- 

 alysis from tbe beginning of our knowledge upon tbe subject until July, 1887. Tbe 

 work is arranged as an alphabetical index to topics as well as of substances wliicb 

 have been spectroscopically examined, followed by an alphabetical list of the authors. 

 It comprises 3,829 titles and the names of 799 authors, and forms an octavo volume of 

 4.33 pages, including iatroductory matter and supjilement. 



659. "A Table of Speciiic Gravity for Solids and Liquids (new edition, revised and 

 enlarged)," by Frank Wigglesworth Clark. This work is a revised edition, entirely 

 re-written, of specific gravity tables, by the same author, published by this Institu- 

 tion December, 1873, and a supplement to the same, published Ajjril, 1876. The 

 melting and boiling temperature appended to many of the substances in these earlier 

 tables have been omitted in the present. A general idea of the expansion given to 

 this important series of density determinations may be snggested by the statement 

 that the original work gave a list of 2,263 different substances, to Avhich the supple- 

 ment added nearly 700 more, while the present work presents a list of .5,227 distinct 

 substances. And as many of tlie substances have had their specific gravities inde- 

 jiendently investigated by several eminent chemists, with slight variations in their 

 results, it may be well to add that the tables actually include 14,465 separate deter- 

 minations of these constants, averaging about two and three-fourths independent ex- 

 aminations to every substance catalogued. The large mass of material thus ex- 

 hibited furnishes a creditable record, both of the rapid extension of minute chemical 

 investigation in the last dozen years and of the diligence of the present compiler, Mr. 

 Clark, who has himself, moreover, done very meritorious work in the direction of 

 specific gravity determinations. 



The work forms an octavo volume of 417 pages in all, and it is under consideration 

 whether it may not be well, in view of the intercut of chemists in the table and tbe 

 demand for them, to jiut the sale copies in the hand of a publisher. 



660. "Miscellaneous Collections," Vol. xxxii. This volume is made up of the 

 two works last mentioned, in the order, first, Clark's Table of Specific Gravity ; second, 

 Tuckerman's Bibliography of Spectroscopic Analysis. It forms an octavo volume of 

 855 pages. 



661. " Bulletin of the Philosophical Society of Washington," Vols, ix, x. Contain- 

 ing the minutes of tbe society and of the mathematical section for the years 1886, 



1887, together with the proceedings of the Baird memorial meeting, held January 11, 



1888. The bulletin for these two years forms an octavo volume of 376 pages, embel- 

 lished with a phototype likeness of Professor Baird. 



662. "Miscellaneous Collections," Vol. xxxiii. This volume consists entirely of 

 the bulletins of the Philosophical Society of Washington, and is made up of No. 543. 

 Bulletin, Vol. vi, for the year 1883 ; No. 592, Bulletin, Vol. vii, for the year 1884 ; No. 

 636, Bulletin, Vol. viii, for the year 188.5, and No. 661, just previously described. 

 Bulletin, Vol. ix, for 1886, and Vol. x, for 1887. The following note is apjiended to 

 the general table of contents on page 5: "With this volume (containing the last five 

 volumes of the bulletins of the Philosophical Society of Washington) is terminated 

 the re-issue of these proceedings in the series of Miscellaneous Collections. It may 

 be stated that volumes 1, 2, and 3 of these bulletins formed Vol. xx of the Miscella- 

 neous Collections; volumes 4 and 5 were included in Vol. xxv of the Miscellaneous 

 Collections; and, lastly, volumes 6, 7, 8, 9, and 10, together with the Memorial Pro- 

 ceedings in honor of Professor Baird, and a full index of the whole ten volumes, con- 

 stitute the present Vol. xxxiil of the Miscellaneous Collections." This last forms in 

 all an octavo volume of 91() j)ages, with i^evcxal w(>o4-cut9 and oue plate portrait, 



