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Now then, let's go up into our laboratory, and I'll give you a lesson in elutriation." "I haven't got a dictionary here, uncle," said Tom, with a smile, as they stood at the massive table under the window in the laboratory. "I don't know what elutriation means." "I dare say not. I didn't till I was nearly fifty, Tom, but you soon shall know. Fetch that tin off the shelf."
"A thorough, true-hearted gentleman, who preserves all the best of his boyhood; but come now, work." "Grinding?" said Tom, stripping off his jacket. "Not yet elutriation, Tom," said Uncle Richard, as he led the way up to the laboratory, where the big pan was lifted down upon the stool, and the syphon used to pour the water in the white basin back again. But not quite all.
This scum Uncle Richard proceeded to skim off till the surface was quite clear, and then he glanced at his watch. "Is that scum the elutriation?" said Tom, with a faint grin. "No, boy, the impurity; throw it down the sink.
"And where would you get sieves sufficiently fine at last?" "Muslin?" "Oh, no. Here is where elutriation comes in, Tom; and here you see the use of some of the things I brought back from London the other day. To work. Bring forward that great pan." This was done. "Now empty in the contents of this packet."
"`Elutriation as applied to Emery and other Powders." Lastly he took up the fourth, and read half to himself "`The method practised by Monsieur Foucault in silvering the surfaces of glass specula. I seem to have dipped into the wrong drawer, dad," he said coolly. James Brandon groaned. "I made so sure that I had got the right things. They do look like legal papers, don't they?"
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