The black artificial ones of caoutchouc or gutta-percha are unnatural.

rubber, India rubber, Indian rubber, latex, caoutchouc, whalebone, gum elastic, baleen, natural rubber; neoprene, synthetic rubber, Buna- S, plastic.

Les traces récentes que laissent sur le papier ces divers crayons s'effacent au contact du caoutchouc, ou de la mie de pain; mais, quand elles sont trop anciennes, elles résistent à ces moyens; on a recours alors à l'application du savon, etc., etc.

In Guiana balls are made of caoutchouc, for children to play with; and so elastic are they, that they will rebound several times between the ceiling and floor of a room, when thrown with some force.

" For reply, her governess read: "'The sap of the young wood and of the leaves is milky and contains a large proportion of caoutchouc.'

The sap of the caoutchouc, or India-rubber, tree is the most valuable yet discovered, and, as it is of a milky nature, it can very properly be brought into the present class of trees.

THE CAOUTCHOUC AND THE MILK TREE.

"What dark, strange-looking trees!" exclaimed the children while looking at an illustration of caoutchouc trees in Brazil.

Tropical heat is required to form the caoutchouc; for when the tree is cultivated in hothouses, the substance of the sap is quite different.

"It is caoutchouc mixed with sulphur.

Like the caoutchouc, it is a native of South America; but the sap is a rich fluid that answers for food, like milk.

This liquor is kept in stoneware, or a vessel made of caoutchouc composition, or a large stone hollowed out of five slabs of stone, forming the bottom and four sides, braced together, and luted with caoutchouc, forming a water-tight vessel.

This liquor is kept in stoneware, or a vessel made of caoutchouc composition, or a large stone hollowed out of five slabs of stone, forming the bottom and four sides, braced together, and luted with caoutchouc, forming a water-tight vessel.

The steam is introduced by means of a caoutchouc pipe, and when brought to the boil the pipe is removed.

They made excursions into the forest for days at a time after caoutchouc.

They returned and told their "patron" of their discovery; and by his orders took their caoutchouc overland to the Aripuanan, built a canoe, and ran down with their caoutchouc to Manaos.

They returned and told their "patron" of their discovery; and by his orders took their caoutchouc overland to the Aripuanan, built a canoe, and ran down with their caoutchouc to Manaos.

One tree seemed lacking in this forest, which ought to be very common in this part of the new continent; it was the caoutchouc-tree.

Now, Dick Sand had particularly promised his friend Jack to show him some caoutchouc trees.

The caoutchouc jumping-jacks, the humming-birds, all those seemed constantly to recede.

Behold why the caoutchouc trees, the quinquinas, the products of South America were missing in this country, which was neither the plateau of Atacama nor the Bolivian pampa!

The instrumentalists, men or women, made sharp rattles whizz, noisy drums sound or shudder under small sticks terminated by a caoutchouc ball, "marimehas," kinds of dulcimers formed of two rows of gourds of various dimensionsthe whole very deafening for any one who does not possess a pair of African ears.

ULLI, n. Caoutchouc.

But granting this caoutchouc property, this migratory power, in the Constitution, the inference that it would take Slavery with it is a still more monstrous error than the original premises.

Its waters are open to all nations, and traders exchange manufactured goods for ivory, palm-oil, coffee and caoutchouc, bees-wax and fruits.