"Since the war, yes. We have had to train them to take the places of those who have gone to be soldiers. It is not, of course, heavy work, but it requires skill and judgment since the many varieties of cocoons need different treatment. Here, for example, are dupions, or double cocoons, which as you doubtless already know have more floss on the outside than do others, and must be well cleaned before any attempt at reeling can be made. Often they cannot be run off at all because the two caterpillars that worked together to make the single cocoon have intertwined the threads until they break all to bits when we try to separate them. Here is another species of cocoon." Henri pointed to a pile on the next table. "These are of beautiful texture, smooth and satiny. But they must be treated with tepid, not hot, water, as are a good proportion of the others, and the accumulation of gum mixed with the filament must be soaked out with soap-suds. This will give you an idea how many things there are to think of in reeling. Some cocoons give off their silk too easily, and unless put into cool water will snarl; others fail to give off the thread at all and instead must be treated with hot water, which aids in loosening it. Another difficulty we sometimes encounter is that the reelers cannot catch the end of the thread to begin their work; this usually indicates that the water into which the cocoons have been put is too cool. On the other hand if the silk ruffs up and comes off in snarls upon the brush, the matted masses indicate that the water is too hot. All this the reelers must learn by experience, and they must learn it, too, without wasting our silk. Two general laws underlie this feature of silk-reeling: hot water makes the silk run faster, and cold water retards its progress. Your problem is to see which treatment your cocoons require." "Of course those who sort the cocoons can tell nothing of that," ventured Pierre. "Oh, no. The sorters simply put into one place those cocoons that are of the same kind. The way the cocoons behave in the water is the business of the reeler. We have tanks or basins of a graduated temperature, and the operators soon learn into which one to put a cocoon of a certain type." "I did not dream one had to know so much just to reel off the silk," murmured Pierre. "I had always supposed it would be an easy matter; but now I see it isn't." Henri laughed.