File:American journal of pharmacy (1881) (14595707440).jpg

Identifier: americanjour534111881phil (find matches)
Title: American journal of pharmacy
Year: 1835 (1830s)
Authors: Philadelphia College of Pharmacy Philadelphia College of Pharmacy and Science
Subjects: Pharmacy Pharmacology
Publisher: Philadelphia : Philadelphia College of Pharmacy
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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overed with conical shaped points. Making a section of thestill living sponge, we find the skeleton embedded in a glairy, gelatinousor albuminous substance, about the consistency of raw beef, with anexuding viscous, yellowish clear brown (in the bath sponge a clear gray) Am. Jour. Pharm.)April, 1881. j Sponges. 183 slime, called milk by Greek fishermen. This investing flesh has so littleresemblance to ordinary animal tissue tliat it is technically called sar-code. In this tissue we perceive a system of canals or pores, which rundownward in all directions and enter directly certain little cavities orchambers connected with circuitous passages, which finally lead to largeoutlets or oscula. The pores, belonging only to the flesh, are not visiblein the skeleton, are very small, yet, compared with the cells, very large.In some orders of sponge? the outer walls of tlie flesli o))q\\ anywhere andeverywhere for the admission of food, and no well-defined pores are visible,but open as required.
Text Appearing After Image:
Fig. 1.—Sponge (one-half natural size) attached to rock. 184 Sjmiges. r Am. Jour. Pliarm.I April, 1881. Prof. Grant first observed closely the ceaceless fiovv^ of liquid matterthrough and out of the living si)onge. Another discussion has been hadover the manner in which this is caused or maintained. Dutrochet, hav-ing made his celebrated discovery of that law of endosmose whicli regu-lates the transmission of fluids of unequal densities through organic mem-branes, was perhaps biased or prejudiced in applying the same law to thesolution of this 2)roblem. At any rate, naturalists now agree that the flowis produced by the lashes or cilia, with which the unnumbered animalculesare each provided. The little chamber into which the pore opens has itswall lined with these uniciliated cells, and each lashes its cilium with vigor,and all harmoniously downward and inward, the effect vacuum above, thewater, of course, passing in, being carried through the ramifications andout of the oscula with

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