It may be mentioned that solutions of the three couplers just named may be kept for some time without decomposition, but as soon as soda and acetate of soda are added they begin to decompose and then cannot be kept more than a few hours in a good condition. It is a good plan therefore not to add the acetate of soda until the bath is to be used. An excess of coupler in the bath does no harm, but a deficiency may lead to poor and weak shades being developed. The following recipes show the dyes which may be applied by this method and give some idea of the colours that can be got. Only the dye-stuffs are given. Any of the above couplers can be used with them as may be most convenient. _Black._--Dye with 5 lb. Benzo-nitrol black B, 1 lb. soda and 20 lb. Glauber's salt. _Olive Green._--Dye with 6 lb. Primuline, 3 lb. Titan ingrain blue and 20 lb. salt. _Black._--Dye with 4 lb. Dianil black C R, 2 lb. soda and 25 lb. salt. _Dark Blue._--Dye with 2 lb. Dianil dark blue R, 1 lb. Dianil dark blue 3 R, 2 lb. soda and 25 lb. salt. _Gold Brown._--Dye with 1 lb. Primuline, 8 oz. Dianil brown R and 20 lb. salt. _Chestnut._--Dye with 3 lb. Primuline, 3/4 lb. Dianil brown G O, 1 lb. Dianil brown E, 1 lb. soda and 20 lb. salt. _Dark Brown._--Dye with 1 lb. Dianil brown 3 G O, 3 lb. Dianil brown D, 1 lb. soda and 20 lb. salt. _Dark Green._--Dye with 4 lb. Primuline, 1-1/2 lb. Dianil black C R, 1 lb. soda and 20 lb. salt. _Walnut Brown._--Dye with 1 lb. Dianil brown 3 G O, 8 oz. Dianil brown R, 3 lb. Dianil brown B D, 1 lb. soda, and 20 lb. salt. _Light Green._--Dye with 3 lb. Primuline, 8 oz. Dianil blue B, 5 oz. Dianil dark blue R, 1 lb. soda, and 20 lb. salt. _Orange Yellow._--Dye with 3-1/4 lb. Primuline, 1 lb. Oxydianil yellow, and 25 lb. salt. _Olive._--Dye with 3-1/2 lb. Primuline, 8 oz. Dianil brown 3 G O, 8 oz. Dianil blue B, 4 oz. Dianil dark blue R, 1 lb. soda, and 25 lb. salt. _Bright Yellow._--Dye with 2 lb. Primuline, and 20 lb. salt. _Gold Yellow._--Dye with 2 lb. Diamine fast yellow A, 1 lb. soda, and 20 lb. salt. _Bright Walnut._--Dye with 1/2 lb. Diamine nitrazol brown B, 1 lb. Oxydiamine orange R, 1 lb. soda, and 20 lb. Glauber's salt. _Gold Brown._--Dye with 1/2 lb. Diamine nitrazol brown G, 1 lb. Primuline, and 20 lb. salt. _Green._--Dye with 2 lb. Primuline, 1 lb. Diamine nitrazol black B, 1 lb. soda and 20 lb. salt. _Pale Chestnut._--Dye with 1 lb. Primuline, 1/2 lb. Oxydiamine orange R and 20 lb. salt. _Moss Brown,_--Dye with 2 lb. Primuline, 1 lb. diamine jet black O O and 20 lb. salt. _Chocolate._--Dye with 1-1/2 lb. Diamine brown V, 2 lb. Diamine nitrazol brown R D, 2 lb. soda and 20 lb. Glauber's salt. _Olive Brown._--Dye with 2 lb. Diamine nitrazol brown G, 1 lb. Diamine nitrazol black B, 1 lb. soda and 20 lb. Glauber's salt. _Russian Green._--Dye with 2 lb. Diaminogene extra, 2 lb. soda and 20 lb. Glauber's salt. _Bronze Green._--Dye with 2 lb. Diamine grey G, 2 lb. soda and 20 lb. Glauber's salt.