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The finely pounded bark soon began to float down the river from the bridges as it might were there a tannery in the neighbourhood. Presently white foam began to form in large sheets, in places twenty-five centimetres thick and looking much like snow, a peculiar sight between the dark walls of tropical jungle.

A few cubic centimetres of sweetened yeast-water are put in it and boiled, so that the steam may destroy any germs adhering to the sides; and when cold the liquid is impregnated by means of a trace of pure yeast, introduced through the glass- stoppered tube.

Tiedemann assigns, as the cranial contents in the Negro, 40, 38, and 35 ounces. The cranium holds rather more than 36 ounces of water, which corresponds to a capacity of 1033.24 cubic centimetres. Huschke estimates the cranial contents of a Negress at 1127 cubic centimetres; of an old Negro at 1146 cubic centimetres.

On the other hand he found that the cranial capacity of forty-five murderers was 1,580 cubic centimetres, also superior to the general average.

The gauge of a perforation is determined by the number of holes in this distance. Scales have been prepared for measuring perforations but it would be superfluous to attempt to describe them here. One of the largest perforations that has been used for stamps has seven holes in two centimetres. This was used on the stamps of France by Susse Freres, a firm of stationers.

I take two tubes of thick Bohemian glass, about 5 centimetres in diameter and 20 centimetres long. In each of the tubes I slip a primary of very thick copper wire. On the top of each tube I wind a secondary of much thinner gutta-percha covered wire. The two secondaries I connect in series, the primaries preferably in multiple arc.

We had barely got to ten metres, when loud cries from below and the disquieting noise of rushing water told me that something was wrong. I blew all tanks, surfaced, left the First Lieutenant on watch and went below. There were five centimetres of water on the battery boards, and I understood at once that we could never dive again.

In order to consolidate the clay, angular bits of gravel, the size of a lentil, are inserted separately, but only on the outside, in the as yet soft mass. This is the foundation of the structure. Fresh layers follow, until the cell has attained the desired height of two or three centimetres. Man's masonry is formed of stones laid one above the other and cemented together with lime.

We have already said that when we grounded, the sounding line marked only five metres, and sixty centimetres; and at low water it marked, four metres sixty centimetres, the frigate therefore saved by a metre: however, as soon as we had stranded, the boats which went out to sound, met with places deeper than that, where we struck, and many others not so deep; which made us suppose that the reef is very uneven and covered with little elevations.

On each side of the latter might have been a smaller colonette, which would account for the capital carried off by us to Egypt. Thus, adding 2 metres 87 centimetres for the northern end swept into the valley, we have a length of 7 metres 89 centimetres; and the additional half thickness of the east wall would bring it to a total of 8 metres 30 centimetres.