A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c16.s2.6

v1.c16.s2.6

³ He is in error on this point, as he had not consulted, or probably had no acquaintance with, the old literature on the subject. Prof. Macdonell very properly points out "the dangers of the *argumentum ex silentio* [as] furnished by the fact that salt, the most necessary of minerals, is never once mentioned in the Rig-