278 EXPERIMENT STATION REOOKD. 



the loaves, or O.L'l) to 23.5 per cent of the eaiboii eontaiiied in tlie leaf. 

 The hi.uheraiuoiint was «;iveii off in the scccmkI .uroiip of exi)eriinents. 



Influence of town atmosphere on vegetation (.4 /;.s. /;/ Gta-d. Chron.^ 

 Id {l!<!)i), scr. .7, p. 344). — Exi>erimeiits were made on Hydrtimjea hor- 

 tciisi.s to ascertain the best kind of niannre f<n' this plant, and inciden- 

 tally the effect of city atmosphere was very strikingly shown. Plants 

 from the same nursery were grown under as nearly the same conditions 

 of soil, mannre, and attention as possible at Berlin, in a park sur- 

 rcmnded by large buildings and near "J, railroad termini; at Lichter- 

 felde, about 7 miles southwest of Berlin, in a region where only cottages, 

 fields, and forests surround; and at Spindlersfeld, aboiit 7 miles 

 southeast of Berlin, where there are some large buildings and a few 

 factories. Sixty plants were grown at each station. At Lichterfelde 

 305 shoots were grown, of which 287 produced flowers; at Spindlers- 

 feld 334 shoots were grown, 242 producing flowers; at Berlin only 

 274 shoots were grown and only 152 produced flowers. The diameter 

 of clusters at Spindlersfeld was from 24 to 33 cm., while at Berlin it 

 was 9 to 12 cm. 



Fixation, of free nitrogen by algae, P. Kohsowitsch {Bot. Ztg., 

 1894, p. !)i ; (ihs. Ill ('hc)ii. Zt;/., IS {Is!i4), No. .'j^^ Report., p. 101). — 

 The author shows that there is no assimilation of free introgen of the 

 air in i)ure cultures of 2 alga^. belonging to the genera Ci/stococcus 

 and Stichdcoccn.s, when under suitable conditions for their growth. 

 The experiment of various authors in which by contact of bacteria and 

 alga' in the light the free nitrogen of the air was fixed, the author 

 explains through the sup])()sition that algic are unable to flx free 

 nitrogen but play a secondary part, the bacteria furnishing carbon 

 dioxid which they form during the processes of assimilation in the 

 light. In other cases, not pure cultures, through the presence of sugar 

 the nitrogen tixaticm appeared to be greatly assisted. It appears that 

 nitrogen fixation would be favored by the ])resence of alga' with jelly- 

 like membranes, as Nostoe, and it is not unlikely that the slime 

 membranes of bacteria oft'er an especially good nourishing medium 

 through which iixation may take place. 



List of medicinal plants of commercial value gathered in North Carolina, 



W. SiMi'SON {Amcr. Jour. I'harm., 06 (1S94), \o. 10, pp. 4SG-400). 



Hanover fungus flora, ('. Wku.mkr (Jnhrcshn-. uafurhist. (ies.. 1S91-'9.1, pp. 2-90). — 

 List of species, with critical notes. 



The Anonaceae of British India {Ann. Itoij. h'ot. Card. CuhntUi, 1S9.1; ahn. in 

 Bot. Cnitbl., f,9 (IS94), No. 12, pp. 371, 372). 



Mauritius and other fiber plants (Barbados Bot. Sla. Misc. Jiiil. 1). — Compiled 

 iuforiiiation re.<jardiu,<; the Mauritius lieiup, Furcraa gi(ianUa, and sisal hemp, Aijave 

 rifiida sisirKni((. 



Catalogue of the indigenous plants of Natal, .1. M. Wood (Dinhun: 1894, p. 47). — 

 A proliiuinary list of the phanerogams and vascular cryptogams of Natal, nicluding 

 a few from Zululand. The list contains 82!S genera and 2,607 species. 



A companion for the Queensland student of plant life, F. M. Bailey (Ann. 

 BpL Dept. A(jr. (Queensland, 1892-93, p. luS). — Au elaborate glossary of botanical 



