(a) Integument heavily plated with firm chitinous cuticle, allowing no expansion and retraction of regions of the body nor change of dimensions, except, in some cases, a dorso-ventral bellows movement.
This was found to be insufficient to account for the whole of the retraction exhibited by iron in strong fields, but it was pointed out by L.
Despite the effect of a false rumour of retraction and a forged confession, his adversaries in despair summoned him to four public conferences (1st, 18th, 23rd and 27th of September), and although still suffering, and allowed neither time nor books for preparation, he bore himself so easily and readily that he won the admiration of most of the audience.
Graham showed that a wire of palladium alloyed with from 24 to 25 parts of gold does not exhibit the remarkable retraction which, in pure palladium, attends its loss of occluded hydrogen.
The elongation is generally found to reach a maximum under a magnetizing force of 50 to 120 units, and to vanish under a force of 200 to 400, retraction occurring when still higher forces are applied.
- Zooecia with soft uncalci fled' walls, the external part of the introvert being closed during retraction by a membranous collar.
In Cheilostomata with a rigid frontal wall A, of Membranipora; B, of an Jullien showed that proimmature zooecium of Cribrilina trusion and retraction were p.m., Parietal muscles.
Natural arrest of haemorrhage arises from (I) the coagulation of the blood itself, (2) the diminution of the heart's action as in fainting, (3) changes taking place in the cut vessel causing its retraction and contraction.
Tentacles infolded, during retraction, into a vestibule which can.
During retraction this "collar" lies concealed in the beginning of the introvert.
Thus among the tongue movements evoked by stigmatic stimulation of the cortex undeviated protrusion or retraction of the organ is not found.
Nickel exhibited retraction from the very beginning (as observed by Barrett), its greatest change of length considerably exceeding that undergone by iron; in a field of Boo the original length was diminished by as much as 1/40,000 part, but stronger forces failed to produce any further effect.
The complicated hysteresis effects which attend magnetic elongation and retraction have been studied by H.
Thus a point A will, when excited soon subsequent to point B, which latter yields protrusion of lips, itself yield lip-protrusion, whereas if excited after C, which yields lip-retraction, it will itself yield lip-retraction.
- Diagram conveying the digested food-products all over of the circulatory the body, and the excretory products to the apparatus in the annephridia, and doubtless it serves at times to tenor body-region of assist in the extension and retraction of parts a Metanemertine.