Chemical News and Journal of Physical Science, Tom 121Chemical news office., 1921 |
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Strona 10
... mixture of tungsten and carbon . The wire is a sufficiently good conductor to allow an electric current to pass through it , so as to raise the temperature to 1100 ° , which is carried out in an atmosphere of hydrogen containing a ...
... mixture of tungsten and carbon . The wire is a sufficiently good conductor to allow an electric current to pass through it , so as to raise the temperature to 1100 ° , which is carried out in an atmosphere of hydrogen containing a ...
Strona 18
... mixture in a pot to any appreciable extent . As most fireclays contained a good deal of iron , iron , which was a colouring matter , was introduced . Therefore , for the optical glass maker , it was essential that he should have a cru ...
... mixture in a pot to any appreciable extent . As most fireclays contained a good deal of iron , iron , which was a colouring matter , was introduced . Therefore , for the optical glass maker , it was essential that he should have a cru ...
Strona 19
... mixture so made that the product of the furnace operation is fully con- trolled . The mixture is fused in an electric furnace of the arc type , and during fusion the material is purified and changed from soft bauxite into hard crystals ...
... mixture so made that the product of the furnace operation is fully con- trolled . The mixture is fused in an electric furnace of the arc type , and during fusion the material is purified and changed from soft bauxite into hard crystals ...
Strona 20
... mixture has the consistency of a mud , which can be easily poured into moulds . After pouring into moulds , the wheels are taken to drying rooms and left until they are thoroughly dry . They are then shaved on special shaving machines ...
... mixture has the consistency of a mud , which can be easily poured into moulds . After pouring into moulds , the wheels are taken to drying rooms and left until they are thoroughly dry . They are then shaved on special shaving machines ...
Strona 25
... mixture , char- coal - solution , removed , filtered , and concentration of filtrate determined by methods varying with solution used . The solution became weaker in solute , rapidly at first and then more slowly . The action is a kind ...
... mixture , char- coal - solution , removed , filtered , and concentration of filtrate determined by methods varying with solution used . The solution became weaker in solute , rapidly at first and then more slowly . The action is a kind ...
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