41 [ 108 ] 



10. Epheraeris of the planet Neptune for the date of the Lalande Observations of May 8 

 and 10, 1795, and for the oppositions of 1847, '48 and '49. By Sears C. Wallier, Esq. ; 

 pp. 32. 



11. Ephemeris of the planet Neptune ibr the year 1850. By Sears C. Walker, Es(i. 

 pp. 10. 



12.* Ephemeris of the planet Neptune for the year 1851. By Sears C. Walker, Es(i 

 pp. 10. 



13.' Occultations visilile In tlie United States during the year 1851. Computed by John 

 Downes, Esq. ; pp. 26. 



The usual edition of each lueinoir consists of fifteen hundred copies, of 

 which one thousand are I'etained for binding info volumes, and the remain- 

 ing five hundred are distributed separately. Of papers printed in 1850 only 

 twelve hundred and fifty copies were published, but the demand has become 

 so great as to render it expedient to increase the number to fifteen hundred. 

 In a single instance (that of Mr. Ellet's memoir) even five hundred extras 

 were found inadequate, and an additional edition of one thousand was 

 printed to meet the denuuid. The average imniber of copies, howeA'er, of 

 the memoirs of the second volume is about fifteen hundred. 



Several memoirs of the third volume of Smithsonian Contributions to 

 Knowledge have been finished, and others are in so great a state of forward- 

 ness as to render its issue early in the year lSo2 more than probable. 

 The papers already completed, and partly distributed in a separate form, 

 are : 



1. Ephemeris of the planet Neptune for 1852. By Sears C. Walker, Esq. ; pp. 10. 



2. Occultations visible in the United States and other parts ot the World in 1862. Com- 

 puted by John Downes; pp. 34. 



3. Monograph of the Fresh Water Cottoids of North America. By Charles Girard ; pp. 

 80 and three plates. 



The work of Professor Harvey, entitled Nereis Boreali Americana, or 

 History of the Marine Algai of North America, part i., Melanospermese, 

 consisting of one hundred and fifty-two pages and twelve colored plates, is 

 also completed, and only waiting for cases from the binder to be published. 



The quarto memoirs for this third volume, now in press, are the following: 



1. Description of Ancient Works in Ohio. By Charles Whittlesey. 



2. Researches in Electrical Rheomutry. By Professor A. Sccchi. 



3. Plantte Wrightiame. By Dr. Asa Gray.§ 



4. Plant£e Eremontiame. By Dr. John Torrey. 



These will, it is hoped, all be completed in a short time. The six plates 

 of corals to accompany Professor Agtissiz's paper for the volume are also 

 now ready. 



The fourth volume ot the fourth series is also in press, aiul will probably be 

 issued simultaneously with the third, in the coming spring. It will consist 

 entirely of a grammar and dictionary of the Dakota language, prepared by 

 Rev. S. R. Riggs, and will occupy about four hundred pages. 



Several plates for vol. of Smithsonian Contributions aie also finished. 



Besides these works hi quarto, several reports in octayohave been printed. 

 The first is the report on jiublic libraries, by Professor C. C. Jewett. This 

 was printed by order of Congress, as an appendix 'b the annual report of 

 the Smithsonian Institution,. It contains two V ^Ired and eight pages. 

 The second report is by Messrs. Booth andMo*-] m recent improvements 



♦ The asterisk added to the number indic£\tes iW "* AP Ar^t issued in 185L 



'^h 



