"Do they spin as much as that?" gasped Marie.

"Indeed they do—some of them more. Certain of the finest varieties will even turn out as many as six hundred and twenty-five yards. But that is a high figure. They usually average less."

"It is all wonderful, isn't it?" replied Madame Bretton. "And to think these tiny creatures are responsible for the silk the whole world uses!"

"I know it," agreed Josef. "Of course there are other spinners in the universe, however. The spider, for example, is a most industrious spinner, and I have read that in the past scientists tried to see if some of the larger spiders could not be utilized for silk-making. The velvety pouch, or bag, was removed and by some skilful process the greyish thread inside it was carded off. But the experiment was unsuccessful, for the silk thus made was far less firm and strong than that which came from the silkworm. After this failure another set of men tried to make silk by using the filament of the pinna."

"What is a pinna, Josef?" questioned Marie.

"The pinna is a variety of shell-fish not unlike the mussel; it fastens itself to the rocks and from between its shells gives out threads something like those of the spider or silkworm. By means of them it spins a tough fibre by which it joins itself to any object to which it wishes to cling."

"And did they succeed in making pinna silk, Josef?" demanded Marie eagerly.

"They certainly did!" nodded Josef. "Along the Mediterranean were several places where they manufactured pinna thread. They even spun some fine, silky fabrics from it. But they never could get enough of the filament to make the industry practical, although in 1754 they did send to Pope Benedict XIV some stockings made from pinna silk. They were spun from very fine thread, and were so closely woven and so hot that I doubt if he cared to wear them unless in cool weather. Since then the weaving of pinna silk has been abandoned, although now and then one sees bits of it in some old fabric, or on exhibition somewhere. It is chiefly regarded as a curiosity."

"What a lot you know, Josef!" murmured Marie, astonished.

Josef laughed.