This paper deals with Grassmann's and Bartholomae's Laws in Sanskrit. The former has the effect of distributing aspiration inside a root. The second accounts for the progressive assimilation of voicing and aspiration. Grassmann's Law, for example, is responsible for the alternation between bodh-ati '3rd sg. pres. ind' of the root /bhaudh/ 'know, wake' and bhot-sya-ti '3rd sg. fut'. In the former aspiration appears on the final consonant of the root while in the latter it appears on the initial consonant of the root. Grassmann's Law is intended to account for this migratory behavior. Bartholomae's Law, on the other hand, is intended to account for what happens in the form buddha 'past participle' from /bhudh + ta/ where in addition to progressive voicing assimilation, aspiration migrates from the root final consonant to the following consonant.