The Intellectual observer (1865) (14784359912)

Identifier: intellectualobse61865lond (find matches)

Title: The Intellectual observer

Year: 1862 (1860s)

Authors:

Subjects: Science

Publisher: (London : Groombridge and Sons)

Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

Text Appearing Before Image:

mon in autumn on the dung ofvarious animals, especially that of pigs and horses. It has,however, been observed by Ferdinand Cohn, on a decayedmass of some species of Oscillatoria, a genus belonging to theAlgaa. It is conspicuous frequently from its bright yellow ororange stem, and deep olive brown or black sporangia, theformer of which almost always sparkles with little dew-drops,in which a minute elongated worm or worm-like body has beenseen occasionally to move with great rapidity. The nature ofthis body has not at present been fully determined, and it isnot certain that observers have always seen the same thing,for the motion is described by some as taking place in thecavity of the stem, while Durieu de Maisonneuve observedit in a colourless cell produced in place of the sporangium.Some think that it may have some important vital connectionwith the plant, but this does not seem very probable, and, as* From ir?\os, a_hat, and /8aAAa>, I cast. ■ . ■ : . * . ■ r ■ ■ i7-»

Text Appearing After Image:

VEGETABLE MORTARS. SphserobolTi3 stellatus, fig. 1 to 5.Pilobolus cry3tallinu3, fig. 6 to 8. Vegetable Mortars. 255 Dr. Johnson intimates, where we have nothing to say, it isbetter to say nothing.* A branched thread which forms the root penetrates thematrix, the tip of which is elongated and swollen, and ulti-mately is divided by a transverse partition from the motherthread. The contents of this second joint circulate round thewalls, leaving a cavity in the centre. The apex is graduallyseparated by a constriction from the lower part, and assumes aglobular form with a dark tint, while the top of what is nowthe stem swells out like the hood of a cobra; a second parti-tion is formed between the two, which gradually protrudes,pressing forcibly against the sporangium, and at the time whenthe spores are matured, the pressure from behind becomes sogreat, that the outer coat of the sporangium separates allround at the dissepiment, and the sporangium itself is ejectedto a distance of several i

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1865

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