. 322 NEW TRACKS IN NORTH AMERICA. 
like syrup, then dilute with water, in the proportion of 1 grain of 
the drachm of water; filter, and it will be ready for use. No change or 
precipitation of gold can take place, so that the bottle is always in good order. 
amount, in aqua regia, evaporate in a sand-bath until the solution appears 
1 
TONING BATH. 
Warm water . 
Unioride of gold 3. iiss PAW es ee 2 drachms. 
Neutralise carefully with ammonia. Do not get an excess, or the prints will 
be liable to blister, then add 30 grains of ‘salt. 
ash the prints well before toning, then place them in a dish of warm 
water, putting half-a-dozen at a time into the toning bath. Almost any colour 
desired may be obtained. 
Of all the many toning processes given to the public—some very complicated 
improved by the addition of a small quantity of nitrate of uranium. 
chemical is, however, tricky and unreliable. Wash for half an hour, and fix. 
FIXING SOLUTION. Ss 
When the hyposulphate is dissolved, add to it three or four drops of ether ; 
wash thoroughly, If possible, use warm water in the last washing. 
* * ~ * * * * 
The climate in which I worked was usually so dry that I had to use my 
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printing ; and what I gained by strengthening, I lost again by rewashing with 
the bad water. Such negatives should be kept as they are, and never destroyed, 
for they are the very best from which to take sunlight enlargements afterwards, 
en my bromide of cadmium failed, I replaced it with iodide of potassium, 
and obtained quite as good results with landscapes, with the advantage of 
ving & more permanent collodion. The softest pictures were, however, from 
the bromide of magnesium collodion, although this will not keep more than a 
THE END, 
PRINTED BY VIRTUE AND CO., CITY ROAD, LONDON. 
RY ae eS ne ee 
