582 



SCIENCE. 



[Vol.. 11., No. 38. 



tre-fiU at each end aild the constant heiglit of th(\ 

 'grade triangle ' (which is formed by the road-bed and 

 the side-slopes produced); at the resultant heights 

 on the diagram, measure, with the scale of cubic 

 yards, the lengths of the ordinates terminated by tlie 

 slope-lines at each station respectively; their sum, 

 diminished by the ' grade prism,' is the average quan- 

 tity for the station of one hundred feet. 



— A paper upon Economy in highway bridges, by 

 Prof. J. A. L. Waddell, fl'as read. Its objects are to 

 determine the most economical depth and number of 

 panels for spans from forty to two hundred feet; the 

 lengths at which it is better to change fi'om pony 

 truss to thorough bridge, and from single to double 

 intersection; the exact dead loads, and the amounts 

 of lumber and iron for each case. 



— Mr. Lester F. Ward has published in the U. S. 

 fish-commission bulletin a list of the marsh and 

 aquatic plants of the northern United States, which 

 will be useful to those interested in aquaria and 

 fish-ponds. The list numbers a hundred and eighty- 

 one species, sixty-one of which are strictly aquatic, 

 the balance being found in marshy places. Three 

 species are said by Dr. Hessel to be injurious to carp- 

 ponds; viz., Nuphar advena, Nuphar sagittaefolium, 

 and Bidens Beckii. The si^ecies recommended espe- 

 cially for carp-ponds are of the strictly aquatic gen- 

 era, Utricularia and Potamogeton. Of the Composi- 

 tae, only three species, all Bidens, are given as being 

 marsh-loving, or aquatic. 



— The director of the Imperial Japanese govern- 

 ment laboratory at Yokohama, Br. A. J. C. Geerts, 

 died there Aug. 30, aged forty. 



— We have just received intelligence of the death 

 of the distinguished French paleontologist. Dr. Joa- 

 chim Barrande. 



RECENT BOOKS AND PAMPHLETS. 



Bacharach, M. Abriss der geschicbte der potentialtheoi-ie. 

 Gottingen, Vandenhoeck * Bupreclit, 1883. 3+T8 p. 8°. 



Bericht, oflizicller, iiber die.im kiinigliohen glaspalnste zu 

 Muucbeu 1882 stattgehabtt; international^ elektriuiliits-auasttji- 

 limg, verbuudeu rait eicktrotecbniscben versucben. Ked. W. 

 7. Beetz, O. v. Miller, E. Pfeitter. Leipzig, 1883. 244+154 p., 

 illustr. 4". 



Bernstein, n. A. Dagboek van de laatste reis van Ternate 

 Daar Nieuw-Guinea, f^alawati eu Batanta 1864-65, uitgavet door 

 S. C. van Miissclicnbioek. Met aanteekeningen, bijlagen en 

 kaart. 's Cfravenhage, 1883. 258 p., map. 8°. 



Bielirlnger. Scbematiscbe darstellung elektrodynaraiscber 

 maschinen. 2 cbromolitbogriscbe wandtafebr. Niirnberg, 1883. 



r. 



Blakesley, T. H. Electricity at tbe board of trade. Lon- 

 don, LoWy ISSo. 24 p. 8°. 



Block, J. Origines de I'electricitd, de la lumiere, de la cha- 

 leur, et de la matiere. Nancy, 1883. illustr. 8°. 



Brcwrn, J. C. Finland : its forests and forest management. 

 London, Himpkin, 1883. 306 p. 8°. 



Chastaingt, G-. Catalogue des plantes vasculaires des en- 

 virons de La Cbatre (Indre). Cbateauroux, 1883. 199 p. 8°. 



Cracau, J. R. B. Ob und wann? Ein versuch zur beant- 

 ■wortung der frage nacb der mdglicbkeit und dem zeitpunkte des 

 weltunterganges. Braunecbweig, Grafi 1883. 33 p. 8°. 



Dahl, F. Analytiscbe bearbeitung der spinneh Norddeutscb- 

 lands. Kiel, 1883. 100 p., illustr. S'. 



D'Arzano, A. Los babitants de la mer et la flore marine. 

 Limoges, 1883. 120 p. 12°. 



Dietrich, R. Die darstellung der wurzeln der algebraischen 

 gleicbungen durcb unendliobe reiben. Inaug. diss. Jena, Deis- 

 tung, 1883. 44 p. 8°. 



Dubois, A. Cr.„iuis alpins, avec une nollce ^ur la Hore 

 alpt^liv, ii;ir V. Crcpiii. Ijiuxellos, lS8:i. 619 p., lllii»lr. S'. 



Elektrotechnische rundschau. lllusirlru- zoUnchrift 

 zur vi-Mbrfiunn.' niilzlitber kenntnisBe aus dem geliietc derange- 

 wandteu eleklnullalslehrc. Red. Stein, heft 1. Halle, 1883. 

 illustr. 



Pabri, U. Impressloni dclla csposizione di eletlricltk a 

 Parigi ; con aggiunle clie si riferlscono al primo Congresno inter- 

 nazionalc degli eletlricisti. Santagata, Jfeltria, 1882. 140 p. 16'. 



B'leck, II. Uebcr die cberaie in ihrer bedeuluug fUr die ae- 

 sundbeilspllege. Berlin, 1883. 8°. 



Gaffron, K. Beilrage zur anatomic und bisiologic von Pb- 

 ripatus. Inaug. diss. Breslau, jTo/i/er, 1883. 32 p. 8°. 



Galle, -\. Berecbnung der proximiitiiten von asieroiden- 

 buhnen. Inaug. diss. Brcslau, Jiu/iler, 1883. 60 p. 8°. 



Glaischer, J. Factor table for the sixth million: contain. 

 ing tbe least factor of every number not divisible by 2, ,f, or 5 

 between 5,000,000 and 6,000,000. London, 7i(yfei-, !8S3. 4". ' 



Gustavo, F,, et H^ribaud-Joseph, F. ■•'lore d'Au- 

 vergne, conteuant la description de toules les plantes vasculaires 

 qui croissent spontanenient dans lea deparlement du Puy de 

 I)ume et du Uantal,'des clefs analytiques et un vocabulaire des 

 terraes employes. Clermond-Ferr.-ind, 1883. 624 p. 16°. 



Hauck, W. Ph. Die grundlehren der elektricitat rait beBoo- 

 derer riicksicbt auf ibre iinwendungen in der praxis. Wien, 

 1883. 293 p., illustr. 8°. 



Haoiftraann, C. Bedeutung der keimblattertheorie fiir die 

 individualitiitslehre und den generations-wecbsel. Inaug. diss. 

 Jena, JMistung, 1883. 41 p. 8°. 



Henneguy, Ch. Les lichens utiles. Paris, 1883. 120 v.. 

 illustr. 8°. " 



Hess, E. Einleitung in die lehre von der kugelteilung mit 

 besondercr beruckBiobt ihrer anwendnng auf die Iheorio der 

 gleicbfliicbigcn und der gleicheckigen polyeder. Leipzig, Teub- 

 lier, 1883. 1(1 H47.5 p., 16 pi. 8°. 



Hjelt, E. Grnnddragen af allmUnnn organiska kemin. 

 Helsingfors, 1SS3. IBO p. 8°. 



Kallenbacb, E. Polynoe cirriita O. Fr. Mllr. Ein beitrag 

 zur kenntniss der fauna dor Kieler Bueht. Inaug. diss. Jena. 

 Deistung, 1SS3. 38 p., 1 pi. 8°. 



Kauffmann, G. Ueber den /s-napbtolaldebyl und seine 

 derivate die /3-napbtolcarbonsaure und das s-napbtolcnmarin. 

 Inaug. diss. Breslau, Kohler, 1882. 37 )). 8°. 



Kramer, J. Die elektriscbe eisenbahn bcziiglich ihres bauea 

 und betriebes. Wien, 1883. (Elektro-tecbn. bibl. xvii.) illustr. 



Kremser, V. Die bahn der 2 comcten von 1879. Inauff, 

 diss. Breslau, Kohler, 1883. 43 p. 8°. 



Kuntze, O. Pbytogeogenesis. Die vorweltliehe entwioke- 

 lung der erdkruste und der pflanzen in grundzUgen dargestellt. 

 Leipzig, 1883. 240 p. 8°. 



Lankester, E. The cholera: What is it? and How to pre- 

 vent it. London, Soutledge, 1S83. 8°. 



Lista, R. Mis esploraciones y descubrimientos en la Pata- 

 gonia 1877-80. Buenos Aires, 1883. 213 p., illustr. 8°. 



Love, Q. H. Etude sur la constitution moleculaire des corps, 

 sur les lois des volumes moliiculaires, des chaleurs speciflques et 

 des dilatations. Pr6ced6e d'une introduction sur la definition de 

 la loi et celle de la force. Paris, 1883. 2 pi. 8°. 



M., M. K. The birds we see, and tbe story of their lives. 

 N.Y., AVson iC- sons, 1883. 3+93 p., illustr. 10*. 



Mace, E. Les Lycopodiacees utiles. Paris, 1883. 80 p. 4°. 



Macgregor, J. L. L. The organization and valuation of the 

 forests on tbe continental system in theory and practice. Lon- 

 don, 1883. 318 p. 8°. 



Manson, P. The Filaria sanguinis borainis, and certain new 

 forms of pai-.-Ksitic disease in India, China, and warm countries. 

 London, /. «■«, lSS:i. illustr. 8°. 



Microscopical science, studies in. Ed. by A. C. Cole. 

 vol. i. London, BaiUiere. 



Netto, Ladislau. Apercu sur la thdorie de devolution. Con- 

 ference faite a Buenos.Ayres le 25 Oct. 1S82. Rio de Janeiro, 

 imp. Jfessager du Brisil, 1883. 6+22 p. 8°. 



Neumann, C. Hydrodynamische untersuchungen, nebst 

 einer anbang iiber die probleme dor elektrostatik und dor mag- 

 netischen induction. Leipzig, Teubner, 1883. 40+320 p. 8*. 



Oldbricht, C. Beitriige zur kenntniss der einwirkung von 

 trocknem aniraoniakgas auf geschmolzcnes chlorzink, cblor- 

 cadmium und cblornickol. Inaug. diss. Breslau, Kohler, 1883. 

 33 p. 8°. 



Paetel, F. Catalog der conchyliensammlung von F. Paetel. 

 Berlin, Paetel, 1883. 3+271 p. 8°. 



Peters, C. F. W. Die fixsterne. Leipzig, 1883. 169 p., il- 

 lustr. 8°. 



