ScientijiG Intelligence, 
covered Iodine in the bones of the head of the crab ajid of the 
large lobster, but he could not find it in the common lobster. 
17. Method of restoring the White Colours in certain Paint-' 
ings. — M. Merimee having observed, in a design by Raphael, 
that the lights had lost their brightness, applied to. M. Thenard 
Ibr his advice. This distinguished chemist ascribed the effect 
to the circumstance, that the white lead dissolved in water had 
become sulphuretted by the lapse of time, and had been chan- 
ged from white to black ; and having sent to M. Merimee some 
slightly oxygenated water, it was applied to the black parts, and 
the white colour was instantly restored. The water contained 
only five or six times its volume of oxygen. There is reason to 
think, that this method will not succeed equally well with oil 
paintings. Journ, de Physique,^ Mai 1820, p. 398. 
III. NATURAL HISTORY. 
BOTANY. 
18. Fig-Trees. — In Scotland the fig-tree requires to be plant- 
fed in a sheltered situation, and to be trained to a wall having a 
southern aspect. Without these precautions, the fruit would 
not ripen in ordinary seasons. But the necessary consequence 
of training to a wall is the production of strong and succulent 
shoots, the wood of which has not time to acquire firmness or 
niaturity. Our Scottish fig-trees must therefore be covered 
during winter with screens composed of bass-matting, or of 
branches of spruce-fir, (which last have been found to be excel- 
lently adapted to the purpose.) In some of the finer districts 
of England, however, fig-trees succeed perfectly well as stand- 
ards. In standard trees the growth of the wood is not so exu- 
berant, and the wood which is produced acquires sufficient firm- 
ness to withstand the usual winter. Mr Henry Phillips, in his Po- 
marium Britannicum, lately published, gives us an account of a 
fig-orchard in the county of Sussex ; and as a Jiggery may proba- 
bly be a novelty to not a few of our readers, and as the account 
of it constitutes one of the best passages in Mr Phillips’s book, we 
shall extract it. “ There is an orchard of fig-trees at Tarring, 
near Worthing, where the fruit grows on standard trees, and 
ripens as well as in any part of Spain. These trees are so re- 
gularly productive, as to form the principal means of support 
