"The forms present upon it are two pyramids of different slope but each intersecting all three of the crystal axes when properly extended. The lower pyramid intersects the two horizontal axes at distances which are proportional to their unit lengths and if it was extended as shown by the dotted lines would also cut the vertical axis at a distance proportional to its unit length." — Ford, 1912

Sulphur crystal

"The forms present upon it are two pyramids of different slope but each intersecting all three of the…

"Sulphurators are instruments for distributing flowers of sulphur, for the purpose of destroying mildew. In the case of greenhouse plants, such as heaths, simply dusting with sulphur through a muslin bag or dredger is sufficient." — Encyclopedia Britannica, 1893

Epps's Sulphurator

"Sulphurators are instruments for distributing flowers of sulphur, for the purpose of destroying mildew.…

This illustration shows the first stage in the manufacturing of glue. The material used for making the glue (either animal bone or hide) is soaked in a milk of lime (or in some cases, Hydrochloric or Sulfurous acid) to purify and loosen particles.

First Stage in Glue Manufacturing

This illustration shows the first stage in the manufacturing of glue. The material used for making the…

"The sulphur is then further purified by heating it in iron vessels (retorts) without access of air, until it is vaporized. the vapor is led into brick-lined rooms. A part of the gas is suddenly cooled and is deposited as a fine powder on the sides of the room. The form is known as flowers of sulphur. Most of the sulphur vapor condenses in the liquid form, and flows down to the outlet of the condensing chamber." -Brownlee 1907

Sulfur Purification

"The sulphur is then further purified by heating it in iron vessels (retorts) without access of air,…

Sulphur.

Sulphur

Sulphur.

Sulphur.

Sulphur

Sulphur.

"Resinous luster. Color sulphur-yellow, varying with impurities to yellow shades of green, gray, and red. Transparent to opaque. Imperfect conductor of heat." — Ford, 1912

Sulphur

"Resinous luster. Color sulphur-yellow, varying with impurities to yellow shades of green, gray, and…

"Resinous luster. Color sulphur-yellow, varying with impurities to yellow shades of green, gray, and red. Transparent to opaque. Imperfect conductor of heat." — Ford, 1912

Sulphur

"Resinous luster. Color sulphur-yellow, varying with impurities to yellow shades of green, gray, and…

"One allotropic forms of sulphur, that of a lemon-yellow brittle solid, crystallizing in orthorhombic octahedrons." —Hallock 1905

Suphur

"One allotropic forms of sulphur, that of a lemon-yellow brittle solid, crystallizing in orthorhombic…

"An allotrope of sulphur, when heated to 115 degrees Celcius, will cool to be yellowish-brown, needle-shaped crystals, derived from an oblique prism." —Hallock 1905

Sulphur

"An allotrope of sulphur, when heated to 115 degrees Celcius, will cool to be yellowish-brown, needle-shaped…

Laboratory preparation of sulphur trioxide, an important step in the process of making sulphuric acid. "Sulphur (a) burns in the air drawn into the apparatus by an aspirator, and thte sulphur dioxide formed passes with the excess of air into the U-tube (b) which is filled with some loose material to rid the gases of sulphur dust. In the bottle (c) the gases lose their moisture as they make their way through the flass beads drenched with concentrated sulphuric acid. The patinized asbestos in the tube (d) is gently heated, and brings about the union of the sulphur dioxide with the oxygen of the air. The sulphur trioxide resulting from the action is absorbed by concentrated sulphuric acid trickling down through the apparatus (e)." -Brownlee 1907

Sulphur Trioxide Preparation

Laboratory preparation of sulphur trioxide, an important step in the process of making sulphuric acid.…

"Sulphurators are instruments for distributing flowers of sulphur, for the purpose of destroying mildew. In the case of greenhouse plants, such as heaths, simply dusting with sulphur through a muslin bag or dredger is sufficient." — Encyclopedia Britannica, 1893

Sulphurator

"Sulphurators are instruments for distributing flowers of sulphur, for the purpose of destroying mildew.…

Diagrammatic representation of the sulphuric acid contact process. "Sulphur, or ores containing sulphur, are burned in air. The sulphur dioxide and the other gaseous products of the combustion are cooled, freed from dust, arsenic, and most of the moisture, then mixedwith air and passed through a tube containing a catalytic agent, usually finely divided platinum. The oxygen of the air cmbines with the sulphur dioxide and forms the trioxide, which is then combined with water to form sulphuric acid." -Brownlee 1907

Sulphuric Acid Contract Process

Diagrammatic representation of the sulphuric acid contact process. "Sulphur, or ores containing sulphur,…