Has The Orange The Same Uses?

"No, it is more of a food, because the orange contains a little gum and some sugar."

What Acid Does The Orange Contain?

"Mostly citric and malic acid, and citrate of lime."

Then The Orange Has Uses Unknown To The Lemon?

"Yes, oranges are often valuable for invalids when lemons could hardly be used at all."

"The tamarind has. a high per cent of citric acid, also contains some tartaric acid, and a trace of malic acid. It is rich also in potash, and contains as high as 12% of sugar. It is not extensively used, and does not therefore deserve much consideration."