If either of these two kinds of hyposulphite be made93 in a test-tube, we can readily simulate the effect of atmospheric exposure.
Dissolve the hyposulphite of soda in 10,000 grain-measures of water.
The hyposulphite, lastly, should be effectually removed from the negative by soaking in water, which should be frequently changed.
The resulting clear, deep brown-coloured solution is treated with hyposulphite of soda solution until quite colourless.
The lotion of the hyposulphite of soda and the mercurial ointment had apparently but little influence on the disease.
hyposulphite of soda and alum are used for fixing the negative after developing.
Upon treating a portion with solution of hyposulphite of soda, all but the sulphide of silver is dissolved.
It is as hard to get rid of from the copper as hyposulphite is from a negative.
Pale greenish-yellow; insoluble in water and in liquor of ammonia; soluble in a solution of hyposulphite of soda.
I develope the image by a very weak solution of sulphate of iron, and fix with hyposulphite of soda.