Recipe:

Copper sulphate (98 per cent) ... ... ... 1 1/2 oz.

Carbonate of soda (98 per cent) ......... 1 3/4 „

Ammonia solution (strongest) ......... 12 fluid oz.

Water .................. 12 gal.

Dissolve the copper sulphate and carbonate of soda separately, each in \ gal. water; pour soda into copper solution and stir well. When precipitate has settled, pour off clear liquid. Wash precipitate a second time, and pour off liquid when clear. Then add liquid ammonia to precipitated copper carbonate, sufficient to dissolve it. Add water up to 10 gal., and the liquid will be ready for use. It has properties similar to those of Bordeaux Mixture. See also "Eau Celeste".