If 127 parts of iodine, which is an almost black solid, and loo parts of mercury, which is a white liquid metal, be intimately mixed by rubbing them together in a mortar, the two substances wholly disappear, and we obtain instead a brilliant red powder quite unlike the iodine or the mercury; almost the only property that is unchanged is the weight.
The stones were laid without mortar, and many of them are still in situ.
The public buildings are mostly constructed of broken stone and mortar, plastered outside and covered with red tiles, but the common dwellings are generally constructed of tapiarough trellis-work walls filled in with mud.
In times of scarcity the Norse peasant-farmer uses the sweetish inner bark, beaten in a mortar and ground in his primitive mill with oats or barley, to eke out a scanty supply of meal, the mixture yielding a tolerably palatable though somewhat resinous substitute for his ordinary flad-brod.
Ouro Preto has several historic buildings; they are of antiquated appearance and built of the simplest materials - broken stone and mortar, with an exterior covering of plaster.
The granular tufa is useless for either purpose, containing too much earth to be employed in making mortar, and being far too soft to be used as stone for building.
Of rough materials, such as broken bricks or mortar rubbish, over which should be placed a layer of rough turf with the grassy side downwards, and then the good loamy soil to form the border, which should have a depth of about 2 ft.
The potting must be done very firmly, using turfy loam with which a little mortar rubble has been mixed.
It is said that Nicocreon, tyrant of Cyprus, commanded him to be pounded to death in a mortar, and that he endured this torture with fortitude; but the story is doubtful, having no earlier authority than Cicero.
And put together without any mortar, but sustained by their own weight, are built all the massive walls and other structures on the east side of the island.
Digestion, regarded not long ago as little more than a trituration and "coction" of ingesta to fit them for absorption and transfer them to the tissues, now appears as an elaboration of peptones and kindred intermediate products which, so far from being always bland, and mere bricks and mortar for repair or fuel for combustion, pass through phases of change during which they become so unfit for assimilation as to be positively poisonous.
The city is characteristically Portuguese in the construction and style of its buildings - low, heavy walls of broken stone and mortar, plastered and coloured outside, with an occasional facing of glazed Lisbon tiles, and covered with red tiles.
To the former belong such as are found on calcareous and cretaceous rocks, and the mortar of walls (e.g.
Sometimes their homes are mere huts of turf, or of clay tiles, with mortar made from lime and clay or cow-dung.
For this purpose Koch ground up tubercle bacilli in an agate mortar and treated them with distilled water until practically no deposit remained.
Is probable, however, that, all things considered, Materials random rubble in which the flattest side of each block of stone is dressed to a fairly uniform surface, so that it may be bedded as it were in a tray of mortar, secures the nearest approach to uniform elasticity.
All stones must be beaten down into their beds until the mortar squeezes up into the joints around them.
In the best examples this has been secured by bedding the stones near to the water face in somewhat finer mortar than the rest, and sometimes also by placing pads to fill the joints for several inches from the water face, so that the mortar was kept away from the face and was well held up to its work.
On the removal of the pads, or the cutting out of the face of the mortar where pads were not used, the vacant joint was gradually filled with almost dry mortar, a hammer and caulking tool being used to consolidate it.
In the case of the Neuadd dam this difficulty was met by deliberately omitting the mortar in transverse joints at regular intervals near the top of the dam, except just at their faces, where it of course cracks harmlessly, and by filling the rest with asphalt.
The masonry is described by Mr Schuyler as " a rough uncut granite ashlar, with a hearting of rough rubble all laid in cement mortar and gravel."
This, if the dam had been thoroughly well constructed, either with hydraulic lime or Portland cement mortar, would have been easily borne.
The quicklime as quarried from the bluffs slakes perfectly, and with sand makes a fairly good mortar, without calcination or other previous preparation.
The character of the ancient citadel wall at Athens, already mentioned, has given the name "Pelasgic masonry" to all constructions of large unhewn blocks fitted roughly together without mortar, from Asia Minor to Spain.
In preparing the rice for use it is pounded in a wooden mortar to remove the husk, this work being almost always done by the women.
The mortar on them was fifty years old, and was said to be still growing harder; but this is one of those sayings which men love to repeat whether they are true or not.
As my bricks had been in a chimney before, though I did not read the name of Nebuchadnezzar on them, I picked out as many fireplace bricks as I could find, to save work and waste, and I filled the spaces between the bricks about the fireplace with stones from the pond shore, and also made my mortar with the white sand from the same place.