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Updated: September 15, 2025
The lens makes conscientious enquiries; nowhere does it manage to show me the vermin attacking solid nourishment, fatty tissues, muscles or other parts; nowhere do I see them bite, gnaw, or dissect. The following experiment will tell us more fully: I pour into a watch-glass the crowds extracted from the hospitable paunches.
PROCEDURE. Spread 25 grams of the powdered sample on a weighed watch-glass; weigh to the nearest 10 milligrams only and heat at 105°C.; weigh at intervals of an hour, after cooling in a desiccator, until the loss of weight after an hour's heating does not exceed 10 milligrams.
A drop of the oxidized solution should be tested on a watch-glass with potassium ferricyanide, to insure a complete oxidation. The ionic changes which are involved in this oxidation are perhaps most simply expressed by the equation Even with this precaution the entire absence of sulphates from the first iron precipitate is not assured.
"And so cannot have been a spectacle-glass. But the surface was curved one side convex and the other concave and the little piece that remains of the original edge seems to have been ground to fit a bezel or frame. I should say that these are portions of a watch-glass." "That is Polton's opinion," said Thorndyke, "and I think you are both wrong."
A point of light of high intensity is obtained by admitting the parallel rays of the sun through an aperture in a window-shutter, and concentrating the beam by a lens of short focus. The small solar image at the focus constitutes a suitable point of light. The image of the sun formed on the convex surface of a glass bead, or of a watch-glass blackened within, though less intense, will also answer.
The water when placed in a tumbler and agitated gave out sparks, but a small portion in a watch-glass scarcely ever was luminous. Ehrenberg states that these particles all retain a certain degree of irritability. My observations, some of which were made directly after taking up the water, gave a different result.
Cover the precipitate on the glazed paper with a watch-glass to prevent loss of fine particles and to protect it from dust from the air. Place the crucible upon a clean clay triangle, on its side, and ignite, with a low flame well at its base, until all the carbon of the filter has been consumed.
But here again was another instance of the way everything seemed in a conspiracy against me to appear otherwise than ordinary, for in the gleam of the match my watch-glass showed as the face of a little old gray man, uncommonly like the folk-lorist himself, peering up at me with an expression of whimsical laughter.
I took out my penknife and tried to scratch it vainly. Leaning forward towards the gas-lamp, I tried the thing on my watch-glass, and scored a white line across that with the greatest ease. I looked at my interlocutor with rising curiosity. "It certainly is rather like a diamond. But, if so, it is a Behemoth of diamonds. Where did you get it?" "I tell you I made it," he said. "Give it back to me."
"What have you found?" "That is what I am asking myself," he replied. "As far as I can judge by the appearance of these fragments, they appear to be portions of a small watch-glass. I wish there were some larger pieces." "Perhaps there are," said I. "Let us look about the floor under the bed." We resumed our groping about the dirty floor, throwing the light of the lamp on one spot after another.
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