haloids

The groups of fatty acids are distinguished by a characteristic deportment toward halogens; while members of the first series are indifferent to haloids, those of the second and third class combine readily, without suffering substitution, with two respectively four atoms of a haloid.

Scientific American Supplement, No. 470, January 3, 1885 Various

By the action, however, of phosphorus haloids on water an analogous splitting of the water molecule is again observed, one-half of the hydrogen uniting with the halogen to form an acid, the hydroxyl residue then forming a phosphorus compound, thus: PCl_ {3} + 3H_ {2} O = 3HCl + P (OH) _ {3}.

Scientific American Supplement No. 822, October 3, 1891 Various