...evaporated, and then passed through a fine sieve of about 80 meshes to the square inch. One ton of it is then intimately mixed with 21 cwt. of sulphuric acid having...gravity of about 17'35, and afterwards as much water is added as would reduce the specific gravity of the sulphuric acid employed to about 1350. It is then...

...evaporated, and then passed through a fine sieve of about 80 meshes to the square inch. One ton of it is then intimately mixed with 21 cwt. of sulphuric acid having...gravity of about 17'35, and afterwards as much water is added as would reduce the specific gravity of the sulphuric acid employed to about 1350. It is then...

...evaporated, and then passed through a ñne sieve of about 80 meshes to the square inch. One ton of it is then intimately mixed with 21 cwt. of sulphuric acid having a specific gravity of about 17'3;>, and afterwards as much water is added as would reduce the spécifie gravity of the sulphuric...

...intimately mixed with 21 cwt. of sul" phuric acid, having a specific gravity of about 1735, and after" wards as much water added as would reduce the specific gravity...leaden or other suitable vessel, and steam or fire " applied, being well agitated until it reaches a temperature of " 212° Fahrenheit, when the greater...

...clay] is intimately mixed with 21 cwt. of sulphuric acid, having a specific gravity of about 1 7"*^', and afterwards as much water added as would reduce...leaden or other suitable vessel, and steam or fire applied, being well agitated until it reaches a temperature of 212° Fahrenheit, when the greater part...

...gravity of the eolation, which should be so high as to indicate the absence of any tree or uncorabined sulphuric acid. This powder is then passed through...well agitated until it reaches a temperature of 212° Fahr., when the greater part of the sulphuric acid combines with the alumina of the clay, causing a...