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It will be observed that water was used in all the above experiments, where phosphuretted hydrogen was obtained. It is by its decomposition that the hydrogen is extricated. In the first experiment, the oxygen of the water Uniting with the phosphorus, forms phosphoric acid, which is absorbed by the alkali, while the hydrogen being set free, unites with a quantity of the phosphorus, forming phosphoretted hydrogen.
In the next experiment, the hydrogen is furnished by the decomposition of the water, by the zmc, and sulphuric acid.
The phosphuret of lime decomposes the water by uniting with its oxygen, while the hydrogen unites to a quantity of phosphorus as above.
136. Phosphorus readily combines with sulphur, forming a phogphuret of sulphur.
137. In the natural state, phosphorus is found combined'with lime in the form of an acid, forming phosphate of lime, which is the composition of bones.
OF SULPHUR.
138. Sulphur is a well 'known substance of a yellow colour, without much taste and without smell unless it is heated or rubbed. So far as is known, it is a simple body. It exists in nature in great abundance, being found in the animal, vegetable, and mineral kingdoms : but chiefly in the latter. .
Obs. The sulphur of commerce is chiefly dug out of the earth in volcanic countries, or in the craters of extinct volcanoes. It is deposited in these places by sublimation, being brought up by the heat from the depths below, where it existed in combination with metallic substances. It is also obtained, of an inferior quality, during the process of refining coppor ore.
gucci outlet 139- When sulphur is heated to a little above the temperature of boiling water, it melts and becomes completely fluid. But it is a singular fact, that if the heat be raised much above this, it again becomes solid, and becomes fluid again as the temperature is reduced.
If after it is melted, it is safiered to cool, it shoots into crystals.
140. When sulphur is in complete fusion, if it is poured into.water it becomes soft and tenacious like wax.
Obs. in this slate it is made use of to take impressions from medals and engraved stones, and as it soon becomes hard, it will retain tni impression for any length of time.louis vuitton outlet
141. When sulphur is exposed to a beat of about 300 degrees, it sublimes, or is converted into vapor.
Obs. In this stale it is called Jlawers of sulphur, and differs from brimstone only in being more pure, and in a state of minute division
142. Sulphur combines with the earths, alkalies, and metals, and forms a class of compounds called sulphurets.

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