Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . itwould have been difficult to make out its detail at all. have been absent. I have found the same occur insections of Sigillaria from our coal measures, and thisinduces me to think this fragment received its greatestpressure at this point, and thus comparatively relievedthe immediately surrounding parts from the pressurenecessary to destroy structure. It appears to consist entirely of a vast number ofsimple tubular cells, having a very thick wall whichby its slightly darker colour
Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . itwould have been difficult to make out its detail at all. have been absent. I have found the same occur insections of Sigillaria from our coal measures, and thisinduces me to think this fragment received its greatestpressure at this point, and thus comparatively relievedthe immediately surrounding parts from the pressurenecessary to destroy structure. It appears to consist entirely of a vast number ofsimple tubular cells, having a very thick wall whichby its slightly darker colour clearly defines theboundary of each. They are mostly exhibited ascut obliquely transverse, but the few that are dis-covered having a longitudinal section measure about•^ of an inch in length, by ^ in breadth, theyterminate abruptly, and appear to be separated fromthe succeeding cell by an exceedingly thin division,similar to some of the freshwater Algae. As anexample I would mention Phyllactidium tube or cell appears to have been connectedwith the succeeding one at the end only, as no indi-. ,4^:=- •^ Description.—The piece of fossil vegetable, asmounted, measures two tenths of an inch long byjust one-tenth in its widest part ; it is somewhatangular in shape, and, for the reasons presently to bestated, appears to be an almost transverse section ofthe original plant. In colour it resembles a piece ofseasoned oak. It was exceedingly friable and istraversed by many fine fractures. The preservativematerial has doubtless been protoxide of iron, but Icannot help thinking the perfect preservation of thestructure has been in a great measure due to acci-dental protection from the great pressure these plantsmust have suffered, as in one part a perfectly structure-less portion appears, although from the size of the cellsand the general surroundings, the structure should not cation of branching is discernible either in the longi-tudinal or transverse tubes. Occasionall
Size: 1818px × 1374px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
