It is rarely observed in acid catalyzed hydrations and hypohalous additions, but always results in regioselective reactions.  There are several restrictions on its application, including the absence of peroxides.  In addition, an asymmetric reagent, often a hydrogen halide, and an asymmetric alkene must be used.  Stating that the free hydrogen will always add to the double bond carbon that already has a larger number of hydrogen atoms, FTP, identify this rule of organic chemistry named for the Russian who proposed it.
It is rarely observed in acid catalyzed hydrations and hypohalous additions, but always results in regioselective reactions.  There are several restrictions on its application, including the absence of peroxides.  In addition, an asymmetric reagent, often a hydrogen halide, and an asymmetric alkene must be used.  Stating that the free hydrogen will always add to the double bond carbon that already has a larger number of hydrogen atoms, FTP, identify this rule of organic chemistry named for the Russian who proposed it.
It is rarely observed in acid catalyzed hydrations and hypohalous additions, but always results in regioselective reactions.  
Markovnikov rule