Gelehrte Gesellschaften. 95 



Patria. Peninsula Tschuctschica , „Plateau südwestlich von 

 Lütke's Hafen", Aug. 1882. 



Quoad foliorum formam et reticulationem Bryo Wrighti Sulliv. freti 

 Behringensis simülimum, sed notis accuratius illustratis, ut videtur, certe 

 diversum ; nam haec species Capsula majuscula globoso-pyriformi Ibliisque 

 apice hamatulis primo intuitu toto coelo differt. Br. arcticum costa in 

 aristam plus minus longam exeunte jam recedit. 



(Schluss folgt.) 



Gelehrte Gesellschaften. 



Physiographische Grcsellschaft zu Lnud. 



Sitzung vom 28. Mai 1883. 

 Dr. 0. Nordstedt legte Zeichnungen von 2 neuen abweichenden Arten 

 der Gattung Bulbochaete vor. Die eine Art, von A. Löfgren in Brasilien 

 gefunden und abgebildet, war zwar steril, aber doch von allen anderen be- 

 kannten Arten durch einen Kranz von Stacheln an der Mitte aller Zellen 

 mit Ausnahme der basalen und aller Haarzellen verschieden. Die andere 

 Art hatte Vortragender an Characeen, welche aus Neuholland von Baron 

 F. V. Mueller gesandt waren, gefunden. Sie stand in der Nähe von Bulbo- 

 chaete minor A. Br. , ist aber durch eigenthüm liehe Zwergmännchen chara- 

 kteristisch. Die Endzellen dieser Zwergmännchen trugen eine Borste; das 

 Antheridium war auch mitunter in 2 Zweige getheilt. Hierdurch entsteht 

 eine Mittelform zwischen den nicht verzweigten, borstenlosen Zwergmännchen 

 und den gewöhnlichen grossen, borstentragenden, verzweigten männlichen 

 Pflanzen, deren Antheridien doch niemals verzweigt sind. 

 (Originalberichtj. Nordstedt (Lund). 



Report and Proceedings of the Belfast Natural History 

 and Pliilosophical Society 



for the Session 1882 — 83. 

 Meeting of December 5th 1882. 



The President, R. L. Patter son, Esq. in the chair. 



A paper was read by Mr. John Brown, on„the a tmosp he ric feeding 

 of plants". The reader referred to the fact that though much care was taken 

 to provide plants with soil which should supply them with the various salts 

 and other matters necessary to their growth, carbon, which fornis so large 

 a portion of organic tissues , could not be so suijplied , since it is obtained 

 from the air, where it exists in the form of carbon dioxide or carbonic acid 

 gas. On considering the small quantity of this gas present in the air, 

 representing only IV2 part of carbon in 10,000 of air, it had occurred 

 to him that plants must have considerable difficulty in obtaining 

 sufficient for their wants , and they would probably thrive better 

 and grow faster in air atmosphere richer. in carbon dioxide. To 

 fest this supposition six young pea plants were planted in pairs in three 

 garden pots, covered with bell glasses, and all under like conditions, except 

 that No. 1 bell glass had a current of carbon dioxide constantly passing 

 into it ; and under No. 3 was ijlaced a dish containiug Solution of potash, to 

 absorb , if possible , all carbon dioxide in the air within it. No. 2 was left 

 normal for comj)arison. In fom- days after the gas had been admitted there 

 was a decided difference between Nos. 1 and 3. A week after this the difterence 

 was very striking. No. 1 had vigorous large dark leaves and stems half a 

 thick again as No. 3, which was lanky and pale, with the edges of its leaves 

 much serrated, as if the veins were growing on, but could not find food for 

 the fieshy part of the leaf. No. 2 resembled No. 3 more than No. 1. Six 



