398 Correspondence of J. Nickles. 
asked some millions for his gem, and jewellers offered him but 250 frances, 
regarding it only as a matter cf curiosity. It is to be hoped that it will 
- not come again into market as a diamond. 
Silk- Worms.—One of the most a oe distinguished of the mem- 
bers of the society of acclimation, M. n Méneville, who has been 
especially interested in the introduction en new silk-worms, has ‘just suc- 
ceeded in acclimating in France a new silk-worm il China, where it 
lives in the varnish tree (Aylanthus glandulosa he species is the true 
Bombyx Cynthia of Drury, (1773,) figured for the ae time by Dauben- 
ton, Jr, in his colored plates which were published between 1760 and. 
1765, and raised for some centuries in China, where its silk clothes the 
cople. Roxburgh, in 1804, supposed the Zria which is raised in British 
India, to be the same, and this confusion has continued till recently, so 
that the. ttc (or Arrindy-arria, as it is called in Hindoostan,) has gone 
by the n of Bombyx Cynthia. The Eria is a paige g t species liv- 
ing on the] Ricinus. ; and we have several times spoken o 
The study of the species by Guérin Méneville, has gas to light. 
differences between the two in the cocoons and the habits of the worms. 
China and Bengal for very firm tissues. The color of the silk is aoe 
and wear 
Now that t the introduction of the sitkanseins is accomplished, attention 
is turned to the extension of it industrially. Guérin Méneville proposes 
for this end the making of plantations of — a tree that grows 
easily on poor soil; then to place the worms upon them in spring that 
were hatched in the month of May, and let shen eat the leaves. Care 
should be taken to preserve them from the birds, which is easily done 
b 
by an invalid workman incapable of other work, as_ een the custom 
for centuries in China. At the end of June, the first crop be gath- 
ered, and a second in August. The cocoons for reproduction should be 
preserved until the next May, which requires, as with the silk-worm of 
the Ricinus, and the Dipsacus Fullonum, special care in the winter. 
Bibliography. 
At HATCHETTE'’S, Rue Pierre Sarazin, P 
E. DeWarren, L’Inde Anglaise avant et apres os Pinsurrection de 1857. 
3d edition, 2 vols, in 12mo; 1858.—Mr. De Varren has been in the ser- 
vice of the East India Company for twenty years, and speaks from 
sight. The first edition appeared twelve years since. The record of re 
rest, 
Oeuvres Complétes. 2 vols, 12mo; 1858. Blaise 
i a the great theologian, who at t the the age of 
tlie nad ian, did i in 1657, at the age of thirty-nine. This edition is & 
Tepublication of orks, both philosophical and scientific. The latter 
d found ii in the vont volume, co include, besides ios Experiments 
‘acuum, Treatise on tee Equilibrium of Liquids, Treatise on the 
rithn Machine, Treatise on N Orders, 
