The Year-Book of Facts in Science And Art
The Year-Book of Facts in Science And Art
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In our eReader you can find the full English version of the book. Read The Year-Book of Facts in Science And Art Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Year-Book of Facts in Science And Art
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Persoimal, o( L&^^V^ x%^^\\%^ ^ 206 TXAB-BOOK 07 PA.CT8.
few of the eggs, and after three generatiooB, he had, in May, 1865, 20,000 worms on his oaks at Laval. The following is an abridg- ment of his Report : — ^The eggs are^ easily produc^Bd through iSd winter, if kept dry ; and in the spring, when the oaks come into leal, to hatch the eggs it only requires that they should he placed in a room with a sonthem aspect. The worms feed upon any kind of oak, grow rapidly, cast their skins four times..., and in 60 or 65 days begin their cocoons. After the first change, or even from tiie egg, they may be exposed to the open air, as wbj are not affected by the weather ; but as there are sharp frosts in England in May and June, a Utile nursing under cover is advisaUe till the oak-leaves are strong enough to protect them. The wei^t of the cocoon is much greater than those of the mulbeny worm. An emnty one weighs 70 centigrammes (11 grains), while one of the mulberry worm only weighs 33 centigrammes (5i grains).
What to read after The Year-Book of Facts in Science And Art?
You can find similar books in the "Read Also" column, or choose other free books by John Timbs to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Persoimal, o( L&^^V^ x%^^\\%^ ^ 206 TXAB-BOOK 07 PA.CT8.
few of the eggs, and after three generatiooB, he had, in May, 1865, 20,000 worms on his oaks at Laval. The following is an abridg- ment of his Report : — ^The eggs are^ easily produc^Bd through iSd winter, if kept dry ; and in the spring, when the oaks come into leal, to hatch the eggs it only requires that they should he placed in a room with a sonthem aspect. The worms feed upon any kind of oak, grow rapidly, cast their skins four times..., and in 60 or 65 days begin their cocoons. After the first change, or even from tiie egg, they may be exposed to the open air, as wbj are not affected by the weather ; but as there are sharp frosts in England in May and June, a Utile nursing under cover is advisaUe till the oak-leaves are strong enough to protect them. The wei^t of the cocoon is much greater than those of the mulbeny worm. An emnty one weighs 70 centigrammes (11 grains), while one of the mulberry worm only weighs 33 centigrammes (5i grains).
What to read after The Year-Book of Facts in Science And Art?
You can find similar books in the "Read Also" column, or choose other free books by John Timbs to read onlineMoreLess
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