Of the Characeae many are so exceedingly brittle that it is best to float them out like sea-weeds, except the prickly species, which may be carefully laid out on bibulous paper, and when dry fastened on sheets of white paper by means of gummed strips.
With these might be associated the gigantic lily of Queensland (Nymphaea gigantea), the leaves of which float on water, and are quite 18 in.
Certain substances, such as the precious metals, are quite insoluble in the bead, but float about in it.
From these masses of ova dehisce into the body cavity and float in its fluid.
The quantity of mercury or shot inserted depends upon the density of the liquids for which the hydrometer is to be employed, it being essential that the whole of the bulb should be immersed in the heaviest liquid for which the instrument is used, while the length and diameter of the stem must be such that the hydrometer will float in the lightest liquid for which it is required.
The lake begins to freeze in October, but it is only about the end of December that it is frozen in its deeper parts; and it remains ice-bound until the end of March, though broad icefields continue to float in the middle of the lake until broken up by gales.
They have very capacious lungs, extending backwards to the anus; by retaining air in these extensive lungs they are able to float on the surface of the water and to remain under water for a consider able length of time.
Many of the freshwater algae which form a mere crust, such as Palmella cruenta, may be placed in a vessel of water, where after a time they float like a scum, the earthy matter settling down to the bottom, and may then be mounted by slipping a piece of mica under them and allowing it to dry.
In fact, he must be struggling to float on the ocean of problems this family represented.
He then proceeded to float a company, and in 1807 the first public street gas lighting took place in Pall Mall, whilst in 1809 he applied to parliament to incorporate the National Heat and Light Company with a capital of half a million sterling.