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Smith and Norwell report the case of a boy of fifteen both of whose hands showed webbing of the middle and ring fingers and accessory nodules of bone between the metacarpals, and six toes on each foot. The boy's father showed similar malformations, and in five generations 21 out of 28 individuals were thus malformed, ten females and 11 males.
These obsidian nodules are generally angular, with their edges blunted: they are often impressed with the form of the adjoining sphaerulites, than which they are always larger; the separate nodules seldom appear to have drawn each other out by exerting a mutually attractive force.
"Why, Blanche darling!" he exclaimed, all his miner's instincts fully aroused as he chipped and broke off "specimens" here and there, to find tiny pellets and nodules of gold thickly clustering in each, "this mine of yours is worth a nation's ransom; I do not believe there is such another reef as this in the whole world. With proper crushing machinery we might all make our fortunes in a month.
They arc generally a kind of slag, containing nodules or crystals of iron, nickle, and other metals, and look to me as if they had solidified from a liquid or vapour.
The presence of phosphatic nodules and bituminous matter in some of the lowest azoic rocks, probably indicates the former existence of life at these periods. But the difficulty of understanding the absence of vast piles of fossiliferous strata, which on my theory no doubt were somewhere accumulated before the Silurian epoch, is very great.
'The Pholas dactylus' he says, 'makes its hole by grating the chalk with its rasp-like valves, licking it up, when pulverised, with its foot, forcing it up through its principal or bronchial syphon, and squirting it out in oblong nodules.
The nodules of pyrites, often picked up on beaches, with their false appearance of having been melted by intense heat, pass muster easily with children and sailor folk for the genuine thunderbolts.
Here, as on the slopes down to the Quilo and Chikapa, we had an opportunity of viewing the geological structure of the country a capping of ferruginous conglomerate, which in many parts looks as if it had been melted, for the rounded nodules resemble masses of slag, and they have a smooth scale on the surface; but in all probability it is an aqueous deposit, for it contains water-worn pebbles of all sorts, and generally small.
The porphyritic mountains on the coast rise abruptly to a height of between one thousand nine hundred and three thousand feet: between their summits and an inland plain, on which the celebrated deposit of nitrate of soda lies, there is a high undulatory district, covered by a remarkable superficial saliferous crust, chiefly composed of common salt, either in white, hard, opaque nodules, or mingled with sand, in this latter case forming a compact sandstone.
We observed some fossil limestone cropping out of the ground in several places as we rode along, and the flats were on many parts covered with small rounded nodules of lime, similar to those I have noticed as being strewed over the fossil cliffs of the Murray.
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