The crude ammonia salts resulting from the purifica-tion of coal gas are frequently found to contain sulpho-cyanates which render them unfit for manure. In somecases the amount of sulphocyanate of ammonia present wassufficient to destroy the crops where it was applied iSimtfivtn&nue. … Retrograde or Direct Motion of the Sun, To the Editor of the Scientific American : After carefully perusing the article, under this title, in yourissue of March 15, I come to the conclusion that your corres-pondent is wrong in some of his views. He has confoundedthe effects of precession on the…
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