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Updated: June 25, 2025
From some occasional acrimony of the tears, the lining of this duct may be inflamed and thickened, or some foreign body, or some unctuous matter from the ciliary glands, may insinuate itself into the duct, and the fluid accumulates in the sac and distends it, and it bursts; or the ulcer eats through the integument, and there is a small fistulous opening beneath the inner canthus of the eye, or there is a constant discharge from it.
The lacrymal sack, with its puncta lacrymalia, and its nasal duct, is a complete gland; and is singular in this respect, that it neither derives its fluid from, nor disgorges it into the circulation.
Careful examination further proves that the whole substance of the nettle is made up of a repetition of such masses of nucleated protoplasm, each contained in a wooden case, which is modified in form, sometimes into a woody fibre, sometimes into a duct or spiral vessel, sometimes into a pollen grain, or an ovule.
The lachrymal duct is a small canal, leading from the internal angle of the eye to the nostrils, and is the passage through which the tears escape from the eye. This duct may become closed by inflammation of the lining membrane of the nose, caries of the bone, ulcers, fungous growths, or by the presence of some extraneous substance impacted in it.
We will not pay his wit the poor compliment of taking him seriously at the last and pointing out to him that it was Heine who said, "Nobody loves life like an old man!" There will be no need of insistence to urge the old men, useful or useless, to submit to an operation to renew their youth. But it is to be hoped that they will never be asked to submit to the cutting of the genital duct.
When the eyes are open the quantity is sufficient to moisten the eyeball, the excess being carried into the nose so gradually that the attention is not attracted to it. The lacrymal canals are at times blocked by inflammation of the nasal duct, and the fluid collects in the corners of the eyelids and overflows down the cheeks, producing much inconvenience.
The eyes themselves are large, and dark as possible, so as to be generally considered black, their enormous pupils, which are absolutely of that colour, increasing the description. There is always a certain amount of weeping shown at the inner angles. This is owing to a defect in the lachrymal duct.
Some dogs, particularly several breeds of spaniels, have naturally weak eyes, attended by an over-secretion and constant flow of tears, more particularly when exposed to the sun. When there is no disease of the lachrymal duct, the secretion may be diminished and the eyes strengthened by the daily application of some slightly tonic wash, as No. 1, 2, 3, &c.
A rod is placed in a duct at a manhole, one screwed to that, both are pushed forward, another one added and pushed forward, and so on until they extend the entire length of the duct. Then the wire is attached and the rods are pulled out and detached one at a time and with the last rod the wire is through.
Munro denies the parallelism between the Clyde and Portuguese objects. Yet I must hold that stone figurines of women, grotesque heads in stone, cupped stones, stones with cup and duct, stones with rays proceeding from a central point, and perforated stones with linear ornamentation, are rather "parallel," in Portugal and in Clydesdale.
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