Fehling's

In the same way, the optical rotating power decreases, and the cupric reducing power (towards Fehling's solution) increases, as the process of hydrolysis proceeds.

Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Various

-- Fehling's Solution is made as follows: Prepare a solution of Rochelle salts, -- 175 grams of Rochelle salts, 50 grams of sodium hydroxide, and 250 cubic centimeters of water.

School and Home Cooking Carlotta Cherryholmes Greer

Add the filtrate drop by drop until, if necessary, a quantity has been added equal in amount to the Fehling's solution employed, keeping the mixture at the boiling-point during the process.

The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged.

This was estimated in the residue left in the flask after distillation by Fehling's solution in the usual way.

Scientific American Supplement, No. 821, September 26, 1891 Various

Apparently those gums which contain most sugar, as indicated by their reduction of Fehling's solution, are the most susceptible to this change.

Scientific American Supplement, No. 821, September 26, 1891 Various

Boil some of the Fehling's solution in a test-tube.

The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged.

Fehling's well-known solution contains sodio-potassic tartrate, which serves the purpose chiefly of retaining the copper in solution.

Scientific American Supplement, No. 611, September 17, 1887 Various

Fehling's original solution has a tendency to become hyper-sensitive if kept long, a proneness to change that is much increased on dilution.

Scientific American Supplement, No. 611, September 17, 1887 Various

Bottger, as greatly improved by Nylander, is fairly delicate, and not so easily misread as Fehling's.

Scientific American Supplement, No. 611, September 17, 1887 Various

A weighed quantity of the dextrin is dissolved in cold water, filtered from any insoluble starch, and then the glucose determined directly in the clear filtrate by Fehling's solution.

Scientific American Supplement, No. 821, September 26, 1891 Various