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The organism does not readily establish itself in the human body, and seems to flourish best when it finds a nidus in necrotic tissue and is accompanied by aërobic organisms, which, by using up the oxygen in the tissues, provide for it a suitable environment. The presence of a foreign body in the wound seems to favour its action.
It is chiefly valued in Sumatra for the animal part, found in the nidus of the insect, which is soluble in water, and yields a very fine purple dye, used for colouring their silks and other webs of domestic manufacture. Like the cochineal it would probably, with the addition of a solution of tin, become a good scarlet.
The young caterpillars of the gadfly placed in the skins of cows, and the young of the ichneumon-fly placed in the backs of the caterpillars on cabbages, seem to produce their nourishment by their irritating the sides of their nidus.
This information is necessary, to enable me to trace that boundary in my map. I shall be much gratified, also, with a communication of your observations on the curiosities of the western country. It will not be difficult to induce me to give up the theory of the growth of shells, without their being the nidus of animals. It is only an idea, and not an opinion with me.
In objection to this theory of generation it may be said, if the animalcula in femine, as seen by the microscope, be all of them rudiments of homunculi, when but one of them can find a nidus, what a waste nature has made of her productions?
But to the jungle again, The great bamboo towers up along the river sides in its feathery grace, and behind it the much prized Malacca cane, the rattan, creeping along the ground or climbing trees and knotting them together, with its tough strands, from a hundred to twelve hundred feet in length, matted and matting together while ferns, selaginellas, and lycopodiums struggle for space in which to show their fragile beauty, along with hardier foliaceous plants, brown and crimson, green and crimson, and crimson flecked with gold; and the great and lesser trees alike are loaded with trailers, ferns, and orchids, among which huge masses of the elk-horn fern and the shining five-foot fronds of the Asplenium Nidus are everywhere conspicuous.
There were some superb plants of the glossy tropical-looking bird's- nest fern, or Asplenium Nidus, which makes its home on the stems and branches of trees, and brightens the forest with its great shining fronds. I got a specimen from a koa tree. The plant had nine fronds, each one measuring from 4 feet 1 inch to 4 feet 7 inches in length, and from 7 to 9 inches in breadth.
Mere accident, therefore, of local position, much more when united with that avowed inveteracy of malignant feeling, which was bitter enough to rouse a re-action of bitterness in the mind of Lord Clarendon, would go far to account for the wreck of many memorials relating to Shakspeare, as well as for the subversion of that quiet and security for humble life, in which the traditional memory finds its best nidus.
Now in these simple products of nature, if the female contributed to produce the new embryon equally with the male, there would probably have been some visible similarity of parts for this purpose, besides those necessary for the nidus and sustenance of the new progeny.
I have never been able to trace the development of Torula into a true mould; but it is quite easy to prove that species of true mould, such as Penicillium, when sown in an appropriate nidus, such as a solution of tartrate of ammonia and yeast-ash, in water, with or without sugar, give rise to Torulae, similar in all respects to T. cerevisiae, except that they are, on the average, smaller.
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